diff --git a/benches/benches/bevy_ecs/world/commands.rs b/benches/benches/bevy_ecs/world/commands.rs
index 5f2f8a01f5213..19128f80ba7da 100644
--- a/benches/benches/bevy_ecs/world/commands.rs
+++ b/benches/benches/bevy_ecs/world/commands.rs
@@ -43,8 +43,8 @@ pub fn spawn_commands(criterion: &mut Criterion) {
             bencher.iter(|| {
                 let mut commands = Commands::new(&mut command_queue, &world);
                 for i in 0..entity_count {
-                    let entity = commands
-                        .spawn_empty()
+                    let mut entity = commands.spawn_empty();
+                    entity
                         .insert_if(A, || black_box(i % 2 == 0))
                         .insert_if(B, || black_box(i % 3 == 0))
                         .insert_if(C, || black_box(i % 4 == 0));
diff --git a/crates/bevy_ecs/src/system/commands/mod.rs b/crates/bevy_ecs/src/system/commands/mod.rs
index fca9e8f94bcc9..4f941c07a6721 100644
--- a/crates/bevy_ecs/src/system/commands/mod.rs
+++ b/crates/bevy_ecs/src/system/commands/mod.rs
@@ -390,7 +390,9 @@ impl<'w, 's> Commands<'w, 's> {
     /// - [`spawn_batch`](Self::spawn_batch) to spawn entities with a bundle each.
     #[track_caller]
     pub fn spawn<T: Bundle>(&mut self, bundle: T) -> EntityCommands {
-        self.spawn_empty().insert(bundle)
+        let mut entity = self.spawn_empty();
+        entity.insert(bundle);
+        entity
     }
 
     /// Returns the [`EntityCommands`] for the requested [`Entity`].
@@ -1043,7 +1045,7 @@ impl EntityCommands<'_> {
     /// # bevy_ecs::system::assert_is_system(add_combat_stats_system);
     /// ```
     #[track_caller]
-    pub fn insert(self, bundle: impl Bundle) -> Self {
+    pub fn insert(&mut self, bundle: impl Bundle) -> &mut Self {
         self.queue(insert(bundle, InsertMode::Replace))
     }
 
@@ -1077,7 +1079,7 @@ impl EntityCommands<'_> {
     /// # bevy_ecs::system::assert_is_system(add_health_system);
     /// ```
     #[track_caller]
-    pub fn insert_if<F>(self, bundle: impl Bundle, condition: F) -> Self
+    pub fn insert_if<F>(&mut self, bundle: impl Bundle, condition: F) -> &mut Self
     where
         F: FnOnce() -> bool,
     {
@@ -1102,7 +1104,7 @@ impl EntityCommands<'_> {
     /// The command will panic when applied if the associated entity does not exist.
     ///
     /// To avoid a panic in this case, use the command [`Self::try_insert_if_new`] instead.
-    pub fn insert_if_new(self, bundle: impl Bundle) -> Self {
+    pub fn insert_if_new(&mut self, bundle: impl Bundle) -> &mut Self {
         self.queue(insert(bundle, InsertMode::Keep))
     }
 
@@ -1120,7 +1122,7 @@ impl EntityCommands<'_> {
     ///
     /// To avoid a panic in this case, use the command [`Self::try_insert_if_new`]
     /// instead.
-    pub fn insert_if_new_and<F>(self, bundle: impl Bundle, condition: F) -> Self
+    pub fn insert_if_new_and<F>(&mut self, bundle: impl Bundle, condition: F) -> &mut Self
     where
         F: FnOnce() -> bool,
     {
@@ -1147,10 +1149,10 @@ impl EntityCommands<'_> {
     /// - `T` must have the same layout as the one passed during `component_id` creation.
     #[track_caller]
     pub unsafe fn insert_by_id<T: Send + 'static>(
-        self,
+        &mut self,
         component_id: ComponentId,
         value: T,
-    ) -> Self {
+    ) -> &mut Self {
         let caller = Location::caller();
         // SAFETY: same invariants as parent call
         self.queue(unsafe {insert_by_id(component_id, value, move |entity| {
@@ -1167,10 +1169,10 @@ impl EntityCommands<'_> {
     /// - [`ComponentId`] must be from the same world as `self`.
     /// - `T` must have the same layout as the one passed during `component_id` creation.
     pub unsafe fn try_insert_by_id<T: Send + 'static>(
-        self,
+        &mut self,
         component_id: ComponentId,
         value: T,
-    ) -> Self {
+    ) -> &mut Self {
         // SAFETY: same invariants as parent call
         self.queue(unsafe { insert_by_id(component_id, value, |_| {}) })
     }
@@ -1224,7 +1226,7 @@ impl EntityCommands<'_> {
     /// # bevy_ecs::system::assert_is_system(add_combat_stats_system);
     /// ```
     #[track_caller]
-    pub fn try_insert(self, bundle: impl Bundle) -> Self {
+    pub fn try_insert(&mut self, bundle: impl Bundle) -> &mut Self {
         self.queue(try_insert(bundle, InsertMode::Replace))
     }
 
@@ -1255,7 +1257,7 @@ impl EntityCommands<'_> {
     /// # bevy_ecs::system::assert_is_system(add_health_system);
     /// ```
     #[track_caller]
-    pub fn try_insert_if<F>(self, bundle: impl Bundle, condition: F) -> Self
+    pub fn try_insert_if<F>(&mut self, bundle: impl Bundle, condition: F) -> &mut Self
     where
         F: FnOnce() -> bool,
     {
@@ -1301,7 +1303,7 @@ impl EntityCommands<'_> {
     /// }
     /// # bevy_ecs::system::assert_is_system(add_health_system);
     /// ```
-    pub fn try_insert_if_new_and<F>(self, bundle: impl Bundle, condition: F) -> Self
+    pub fn try_insert_if_new_and<F>(&mut self, bundle: impl Bundle, condition: F) -> &mut Self
     where
         F: FnOnce() -> bool,
     {
@@ -1321,7 +1323,7 @@ impl EntityCommands<'_> {
     /// # Note
     ///
     /// Unlike [`Self::insert_if_new`], this will not panic if the associated entity does not exist.
-    pub fn try_insert_if_new(self, bundle: impl Bundle) -> Self {
+    pub fn try_insert_if_new(&mut self, bundle: impl Bundle) -> &mut Self {
         self.queue(try_insert(bundle, InsertMode::Keep))
     }
 
@@ -1360,7 +1362,7 @@ impl EntityCommands<'_> {
     /// }
     /// # bevy_ecs::system::assert_is_system(remove_combat_stats_system);
     /// ```
-    pub fn remove<T>(self) -> Self
+    pub fn remove<T>(&mut self) -> &mut Self
     where
         T: Bundle,
     {
@@ -1368,12 +1370,12 @@ impl EntityCommands<'_> {
     }
 
     /// Removes a component from the entity.
-    pub fn remove_by_id(self, component_id: ComponentId) -> Self {
+    pub fn remove_by_id(&mut self, component_id: ComponentId) -> &mut Self {
         self.queue(remove_by_id(component_id))
     }
 
     /// Removes all components associated with the entity.
-    pub fn clear(self) -> Self {
+    pub fn clear(&mut self) -> &mut Self {
         self.queue(clear())
     }
 
@@ -1405,8 +1407,8 @@ impl EntityCommands<'_> {
     /// # bevy_ecs::system::assert_is_system(remove_character_system);
     /// ```
     #[track_caller]
-    pub fn despawn(self) -> Self {
-        self.queue(despawn())
+    pub fn despawn(&mut self) {
+        self.queue(despawn());
     }
 
     /// Pushes an [`EntityCommand`] to the queue, which will get executed for the current [`Entity`].
@@ -1425,8 +1427,7 @@ impl EntityCommands<'_> {
     /// # }
     /// # bevy_ecs::system::assert_is_system(my_system);
     /// ```
-    #[allow(clippy::should_implement_trait)]
-    pub fn queue<M: 'static>(mut self, command: impl EntityCommand<M>) -> Self {
+    pub fn queue<M: 'static>(&mut self, command: impl EntityCommand<M>) -> &mut Self {
         self.commands.queue(command.with_entity(self.entity));
         self
     }
@@ -1468,7 +1469,7 @@ impl EntityCommands<'_> {
     /// }
     /// # bevy_ecs::system::assert_is_system(remove_combat_stats_system);
     /// ```
-    pub fn retain<T>(self) -> Self
+    pub fn retain<T>(&mut self) -> &mut Self
     where
         T: Bundle,
     {
@@ -1480,7 +1481,7 @@ impl EntityCommands<'_> {
     /// # Panics
     ///
     /// The command will panic when applied if the associated entity does not exist.
-    pub fn log_components(self) -> Self {
+    pub fn log_components(&mut self) -> &mut Self {
         self.queue(log_components)
     }
 
@@ -1493,13 +1494,16 @@ impl EntityCommands<'_> {
     /// watches this entity.
     ///
     /// [`Trigger`]: crate::observer::Trigger
-    pub fn trigger(mut self, event: impl Event) -> Self {
+    pub fn trigger(&mut self, event: impl Event) -> &mut Self {
         self.commands.trigger_targets(event, self.entity);
         self
     }
 
     /// Creates an [`Observer`] listening for a trigger of type `T` that targets this entity.
-    pub fn observe<E: Event, B: Bundle, M>(self, system: impl IntoObserverSystem<E, B, M>) -> Self {
+    pub fn observe<E: Event, B: Bundle, M>(
+        &mut self,
+        system: impl IntoObserverSystem<E, B, M>,
+    ) -> &mut Self {
         self.queue(observe(system))
     }
 }
@@ -1512,9 +1516,8 @@ pub struct EntityEntryCommands<'a, T> {
 
 impl<'a, T: Component> EntityEntryCommands<'a, T> {
     /// Modify the component `T` if it exists, using the the function `modify`.
-    pub fn and_modify(mut self, modify: impl FnOnce(Mut<T>) + Send + Sync + 'static) -> Self {
-        self.entity_commands = self
-            .entity_commands
+    pub fn and_modify(&mut self, modify: impl FnOnce(Mut<T>) + Send + Sync + 'static) -> &mut Self {
+        self.entity_commands
             .queue(move |mut entity: EntityWorldMut| {
                 if let Some(value) = entity.get_mut() {
                     modify(value);
@@ -1532,9 +1535,8 @@ impl<'a, T: Component> EntityEntryCommands<'a, T> {
     /// Panics if the entity does not exist.
     /// See [`or_try_insert`](Self::or_try_insert) for a non-panicking version.
     #[track_caller]
-    pub fn or_insert(mut self, default: T) -> Self {
-        self.entity_commands = self
-            .entity_commands
+    pub fn or_insert(&mut self, default: T) -> &mut Self {
+        self.entity_commands
             .queue(insert(default, InsertMode::Keep));
         self
     }
@@ -1545,9 +1547,8 @@ impl<'a, T: Component> EntityEntryCommands<'a, T> {
     ///
     /// See also [`or_insert_with`](Self::or_insert_with).
     #[track_caller]
-    pub fn or_try_insert(mut self, default: T) -> Self {
-        self.entity_commands = self
-            .entity_commands
+    pub fn or_try_insert(&mut self, default: T) -> &mut Self {
+        self.entity_commands
             .queue(try_insert(default, InsertMode::Keep));
         self
     }
@@ -1561,7 +1562,7 @@ impl<'a, T: Component> EntityEntryCommands<'a, T> {
     /// Panics if the entity does not exist.
     /// See [`or_try_insert_with`](Self::or_try_insert_with) for a non-panicking version.
     #[track_caller]
-    pub fn or_insert_with(self, default: impl Fn() -> T) -> Self {
+    pub fn or_insert_with(&mut self, default: impl Fn() -> T) -> &mut Self {
         self.or_insert(default())
     }
 
@@ -1571,7 +1572,7 @@ impl<'a, T: Component> EntityEntryCommands<'a, T> {
     ///
     /// See also [`or_insert`](Self::or_insert) and [`or_try_insert`](Self::or_try_insert).
     #[track_caller]
-    pub fn or_try_insert_with(self, default: impl Fn() -> T) -> Self {
+    pub fn or_try_insert_with(&mut self, default: impl Fn() -> T) -> &mut Self {
         self.or_try_insert(default())
     }
 
@@ -1583,7 +1584,7 @@ impl<'a, T: Component> EntityEntryCommands<'a, T> {
     ///
     /// Panics if the entity does not exist.
     #[track_caller]
-    pub fn or_default(self) -> Self
+    pub fn or_default(&mut self) -> &mut Self
     where
         T: Default,
     {
@@ -1600,12 +1601,11 @@ impl<'a, T: Component> EntityEntryCommands<'a, T> {
     ///
     /// Panics if the entity does not exist.
     #[track_caller]
-    pub fn or_from_world(mut self) -> Self
+    pub fn or_from_world(&mut self) -> &mut Self
     where
         T: FromWorld,
     {
-        self.entity_commands = self
-            .entity_commands
+        self.entity_commands
             .queue(insert_from_world::<T>(InsertMode::Keep));
         self
     }
diff --git a/crates/bevy_input/src/gamepad.rs b/crates/bevy_input/src/gamepad.rs
index 2fee5a4db544c..152efe74c0ea7 100644
--- a/crates/bevy_input/src/gamepad.rs
+++ b/crates/bevy_input/src/gamepad.rs
@@ -1345,7 +1345,7 @@ pub fn gamepad_connection_system(
         let id = connection_event.gamepad;
         match &connection_event.connection {
             GamepadConnection::Connected(info) => {
-                let Some(gamepad) = commands.get_entity(id) else {
+                let Some(mut gamepad) = commands.get_entity(id) else {
                     warn!("Gamepad {:} removed before handling connection event.", id);
                     continue;
                 };
@@ -1353,7 +1353,7 @@ pub fn gamepad_connection_system(
                 info!("Gamepad {:?} connected.", id);
             }
             GamepadConnection::Disconnected => {
-                let Some(gamepad) = commands.get_entity(id) else {
+                let Some(mut gamepad) = commands.get_entity(id) else {
                     warn!("Gamepad {:} removed before handling disconnection event. You can ignore this if you manually removed it.", id);
                     continue;
                 };
diff --git a/crates/bevy_pbr/src/prepass/mod.rs b/crates/bevy_pbr/src/prepass/mod.rs
index ee04e6da91c84..6aaeed96787eb 100644
--- a/crates/bevy_pbr/src/prepass/mod.rs
+++ b/crates/bevy_pbr/src/prepass/mod.rs
@@ -585,7 +585,7 @@ pub fn extract_camera_previous_view_data(
     for (entity, camera, maybe_previous_view_data) in cameras_3d.iter() {
         if camera.is_active {
             let entity = entity.id();
-            let entity = commands.get_or_spawn(entity);
+            let mut entity = commands.get_or_spawn(entity);
 
             if let Some(previous_view_data) = maybe_previous_view_data {
                 entity.insert(previous_view_data.clone());
diff --git a/crates/bevy_pbr/src/render/light.rs b/crates/bevy_pbr/src/render/light.rs
index 212737e058be3..ea0bfd25e7aed 100644
--- a/crates/bevy_pbr/src/render/light.rs
+++ b/crates/bevy_pbr/src/render/light.rs
@@ -435,9 +435,9 @@ pub(crate) fn add_light_view_entities(
     trigger: Trigger<OnAdd, (ExtractedDirectionalLight, ExtractedPointLight)>,
     mut commands: Commands,
 ) {
-    commands
-        .get_entity(trigger.entity())
-        .map(|v| v.insert(LightViewEntities::default()));
+    if let Some(mut v) = commands.get_entity(trigger.entity()) {
+        v.insert(LightViewEntities::default());
+    }
 }
 
 pub(crate) fn remove_light_view_entities(
@@ -447,7 +447,7 @@ pub(crate) fn remove_light_view_entities(
 ) {
     if let Ok(entities) = query.get(trigger.entity()) {
         for e in entities.0.iter().copied() {
-            if let Some(v) = commands.get_entity(e) {
+            if let Some(mut v) = commands.get_entity(e) {
                 v.despawn();
             }
         }
diff --git a/crates/bevy_pbr/src/wireframe.rs b/crates/bevy_pbr/src/wireframe.rs
index 2a1ee1a278acd..413933135c85a 100644
--- a/crates/bevy_pbr/src/wireframe.rs
+++ b/crates/bevy_pbr/src/wireframe.rs
@@ -156,7 +156,7 @@ fn apply_wireframe_material(
     global_material: Res<GlobalWireframeMaterial>,
 ) {
     for e in removed_wireframes.read().chain(no_wireframes.iter()) {
-        if let Some(commands) = commands.get_entity(e) {
+        if let Some(mut commands) = commands.get_entity(e) {
             commands.remove::<MeshMaterial3d<WireframeMaterial>>();
         }
     }
diff --git a/crates/bevy_picking/src/focus.rs b/crates/bevy_picking/src/focus.rs
index 6d9a5d1c95799..fdb5b862be980 100644
--- a/crates/bevy_picking/src/focus.rs
+++ b/crates/bevy_picking/src/focus.rs
@@ -244,7 +244,7 @@ pub fn update_interactions(
     for (hovered_entity, new_interaction) in new_interaction_state.drain() {
         if let Ok(mut interaction) = interact.get_mut(hovered_entity) {
             *interaction = new_interaction;
-        } else if let Some(entity_commands) = commands.get_entity(hovered_entity) {
+        } else if let Some(mut entity_commands) = commands.get_entity(hovered_entity) {
             entity_commands.try_insert(new_interaction);
         }
     }
diff --git a/crates/bevy_render/src/camera/camera.rs b/crates/bevy_render/src/camera/camera.rs
index 2b69cf9bd48c1..702a3aea4b7c5 100644
--- a/crates/bevy_render/src/camera/camera.rs
+++ b/crates/bevy_render/src/camera/camera.rs
@@ -1051,7 +1051,7 @@ pub fn extract_cameras(
             }
 
             let mut commands = commands.entity(render_entity.id());
-            commands = commands.insert((
+            commands.insert((
                 ExtractedCamera {
                     target: camera.target.normalize(primary_window),
                     viewport: camera.viewport.clone(),
@@ -1087,15 +1087,15 @@ pub fn extract_cameras(
             ));
 
             if let Some(temporal_jitter) = temporal_jitter {
-                commands = commands.insert(temporal_jitter.clone());
+                commands.insert(temporal_jitter.clone());
             }
 
             if let Some(render_layers) = render_layers {
-                commands = commands.insert(render_layers.clone());
+                commands.insert(render_layers.clone());
             }
 
             if let Some(perspective) = projection {
-                commands = commands.insert(perspective.clone());
+                commands.insert(perspective.clone());
             }
             if gpu_culling {
                 if *gpu_preprocessing_support == GpuPreprocessingSupport::Culling {
diff --git a/crates/bevy_sprite/src/mesh2d/wireframe2d.rs b/crates/bevy_sprite/src/mesh2d/wireframe2d.rs
index 2a40839b9c507..6f2659fbaaf91 100644
--- a/crates/bevy_sprite/src/mesh2d/wireframe2d.rs
+++ b/crates/bevy_sprite/src/mesh2d/wireframe2d.rs
@@ -162,7 +162,7 @@ fn apply_wireframe_material(
     global_material: Res<GlobalWireframe2dMaterial>,
 ) {
     for e in removed_wireframes.read().chain(no_wireframes.iter()) {
-        if let Some(commands) = commands.get_entity(e) {
+        if let Some(mut commands) = commands.get_entity(e) {
             commands.remove::<MeshMaterial2d<Wireframe2dMaterial>>();
         }
     }
diff --git a/crates/bevy_ui/src/render/mod.rs b/crates/bevy_ui/src/render/mod.rs
index 75cf7b771b564..6b003cd10d321 100644
--- a/crates/bevy_ui/src/render/mod.rs
+++ b/crates/bevy_ui/src/render/mod.rs
@@ -510,9 +510,8 @@ pub fn extract_default_ui_camera_view(
                     TemporaryRenderEntity,
                 ))
                 .id();
-            let entity_commands = commands
-                .get_or_spawn(entity)
-                .insert(DefaultCameraView(default_camera_view));
+            let mut entity_commands = commands.get_or_spawn(entity);
+            entity_commands.insert(DefaultCameraView(default_camera_view));
             if let Some(ui_anti_alias) = ui_anti_alias {
                 entity_commands.insert(*ui_anti_alias);
             }
diff --git a/examples/2d/sprite_slice.rs b/examples/2d/sprite_slice.rs
index 9782710326995..7afb0c975c4d6 100644
--- a/examples/2d/sprite_slice.rs
+++ b/examples/2d/sprite_slice.rs
@@ -83,7 +83,7 @@ fn spawn_sprites(
             ..default()
         });
         if let Some(scale_mode) = scale_mode {
-            cmd = cmd.insert(scale_mode);
+            cmd.insert(scale_mode);
         }
         cmd.with_children(|builder| {
             builder.spawn(Text2dBundle {
diff --git a/examples/3d/anti_aliasing.rs b/examples/3d/anti_aliasing.rs
index e8f929e0d6684..2e6fca92885a2 100644
--- a/examples/3d/anti_aliasing.rs
+++ b/examples/3d/anti_aliasing.rs
@@ -55,7 +55,7 @@ fn modify_aa(
     // No AA
     if keys.just_pressed(KeyCode::Digit1) {
         *msaa = Msaa::Off;
-        camera = camera
+        camera
             .remove::<Fxaa>()
             .remove::<Smaa>()
             .remove::<TaaComponents>();
@@ -63,7 +63,7 @@ fn modify_aa(
 
     // MSAA
     if keys.just_pressed(KeyCode::Digit2) && *msaa == Msaa::Off {
-        camera = camera
+        camera
             .remove::<Fxaa>()
             .remove::<Smaa>()
             .remove::<TaaComponents>();
@@ -87,7 +87,7 @@ fn modify_aa(
     // FXAA
     if keys.just_pressed(KeyCode::Digit3) && fxaa.is_none() {
         *msaa = Msaa::Off;
-        camera = camera
+        camera
             .remove::<Smaa>()
             .remove::<TaaComponents>()
             .insert(Fxaa::default());
@@ -120,7 +120,7 @@ fn modify_aa(
     // SMAA
     if keys.just_pressed(KeyCode::Digit4) && smaa.is_none() {
         *msaa = Msaa::Off;
-        camera = camera
+        camera
             .remove::<Fxaa>()
             .remove::<TaaComponents>()
             .insert(Smaa::default());
diff --git a/examples/3d/depth_of_field.rs b/examples/3d/depth_of_field.rs
index fb8c2282ed088..e56988858ebb7 100644
--- a/examples/3d/depth_of_field.rs
+++ b/examples/3d/depth_of_field.rs
@@ -70,17 +70,16 @@ fn main() {
 fn setup(mut commands: Commands, asset_server: Res<AssetServer>, app_settings: Res<AppSettings>) {
     // Spawn the camera. Enable HDR and bloom, as that highlights the depth of
     // field effect.
-    let camera = commands
-        .spawn(Camera3dBundle {
-            transform: Transform::from_xyz(0.0, 4.5, 8.25).looking_at(Vec3::ZERO, Vec3::Y),
-            camera: Camera {
-                hdr: true,
-                ..default()
-            },
-            tonemapping: Tonemapping::TonyMcMapface,
+    let mut camera = commands.spawn(Camera3dBundle {
+        transform: Transform::from_xyz(0.0, 4.5, 8.25).looking_at(Vec3::ZERO, Vec3::Y),
+        camera: Camera {
+            hdr: true,
             ..default()
-        })
-        .insert(Bloom::NATURAL);
+        },
+        tonemapping: Tonemapping::TonyMcMapface,
+        ..default()
+    });
+    camera.insert(Bloom::NATURAL);
 
     // Insert the depth of field settings.
     if let Some(depth_of_field) = Option::<DepthOfField>::from(*app_settings) {
diff --git a/examples/3d/motion_blur.rs b/examples/3d/motion_blur.rs
index 79e49a1277c73..8d2ebbcaf8a44 100644
--- a/examples/3d/motion_blur.rs
+++ b/examples/3d/motion_blur.rs
@@ -135,35 +135,35 @@ fn spawn_cars(
 
     for i in 0..N_CARS {
         let color = colors[i % colors.len()].clone();
-        let mut entity = commands
+        commands
             .spawn((
                 Mesh3d(box_mesh.clone()),
                 MeshMaterial3d(color.clone()),
                 Transform::from_scale(Vec3::splat(0.5)),
                 Moves(i as f32 * 2.0),
             ))
-            .insert_if(CameraTracked, || i == 0);
-        entity.with_children(|parent| {
-            parent.spawn((
-                Mesh3d(box_mesh.clone()),
-                MeshMaterial3d(color),
-                Transform::from_xyz(0.0, 0.08, 0.03).with_scale(Vec3::new(1.0, 1.0, 0.5)),
-            ));
-            let mut spawn_wheel = |x: f32, z: f32| {
+            .insert_if(CameraTracked, || i == 0)
+            .with_children(|parent| {
                 parent.spawn((
-                    Mesh3d(cylinder.clone()),
-                    MeshMaterial3d(wheel_matl.clone()),
-                    Transform::from_xyz(0.14 * x, -0.045, 0.15 * z)
-                        .with_scale(Vec3::new(0.15, 0.04, 0.15))
-                        .with_rotation(Quat::from_rotation_z(std::f32::consts::FRAC_PI_2)),
-                    Rotates,
+                    Mesh3d(box_mesh.clone()),
+                    MeshMaterial3d(color),
+                    Transform::from_xyz(0.0, 0.08, 0.03).with_scale(Vec3::new(1.0, 1.0, 0.5)),
                 ));
-            };
-            spawn_wheel(1.0, 1.0);
-            spawn_wheel(1.0, -1.0);
-            spawn_wheel(-1.0, 1.0);
-            spawn_wheel(-1.0, -1.0);
-        });
+                let mut spawn_wheel = |x: f32, z: f32| {
+                    parent.spawn((
+                        Mesh3d(cylinder.clone()),
+                        MeshMaterial3d(wheel_matl.clone()),
+                        Transform::from_xyz(0.14 * x, -0.045, 0.15 * z)
+                            .with_scale(Vec3::new(0.15, 0.04, 0.15))
+                            .with_rotation(Quat::from_rotation_z(std::f32::consts::FRAC_PI_2)),
+                        Rotates,
+                    ));
+                };
+                spawn_wheel(1.0, 1.0);
+                spawn_wheel(1.0, -1.0);
+                spawn_wheel(-1.0, 1.0);
+                spawn_wheel(-1.0, -1.0);
+            });
     }
 }
 
diff --git a/examples/3d/pcss.rs b/examples/3d/pcss.rs
index 686fdc66f59b6..ee790004655c6 100644
--- a/examples/3d/pcss.rs
+++ b/examples/3d/pcss.rs
@@ -292,8 +292,8 @@ fn handle_light_type_change(
         app_status.light_type = light_type;
 
         for light in lights.iter_mut() {
-            let light_commands = commands
-                .entity(light)
+            let mut light_commands = commands.entity(light);
+            light_commands
                 .remove::<DirectionalLight>()
                 .remove::<PointLight>()
                 .remove::<SpotLight>();
diff --git a/examples/3d/ssao.rs b/examples/3d/ssao.rs
index 29534cf1da085..e0b87b36d3e4c 100644
--- a/examples/3d/ssao.rs
+++ b/examples/3d/ssao.rs
@@ -110,8 +110,8 @@ fn update(
 
     let (camera_entity, ssao, temporal_jitter) = camera.single();
 
-    let mut commands = commands
-        .entity(camera_entity)
+    let mut commands = commands.entity(camera_entity);
+    commands
         .insert_if(
             ScreenSpaceAmbientOcclusion {
                 quality_level: ScreenSpaceAmbientOcclusionQualityLevel::Low,
@@ -137,7 +137,7 @@ fn update(
             || keycode.just_pressed(KeyCode::Digit5),
         );
     if keycode.just_pressed(KeyCode::Digit1) {
-        commands = commands.remove::<ScreenSpaceAmbientOcclusion>();
+        commands.remove::<ScreenSpaceAmbientOcclusion>();
     }
     if keycode.just_pressed(KeyCode::Space) {
         if temporal_jitter.is_some() {
diff --git a/examples/animation/animation_graph.rs b/examples/animation/animation_graph.rs
index 1d44da5105af3..33a30a88792cd 100644
--- a/examples/animation/animation_graph.rs
+++ b/examples/animation/animation_graph.rs
@@ -307,7 +307,7 @@ fn setup_node_rects(commands: &mut Commands) {
             ));
 
             if let NodeType::Clip(ref clip) = node_type {
-                container = container.insert((
+                container.insert((
                     Interaction::None,
                     RelativeCursorPosition::default(),
                     (*clip).clone(),
diff --git a/examples/ecs/observers.rs b/examples/ecs/observers.rs
index 82100f6b7ee1b..b4da1d863118a 100644
--- a/examples/ecs/observers.rs
+++ b/examples/ecs/observers.rs
@@ -149,7 +149,7 @@ fn on_remove_mine(
 fn explode_mine(trigger: Trigger<Explode>, query: Query<&Mine>, mut commands: Commands) {
     // If a triggered event is targeting a specific entity you can access it with `.entity()`
     let id = trigger.entity();
-    let Some(entity) = commands.get_entity(id) else {
+    let Some(mut entity) = commands.get_entity(id) else {
         return;
     };
     info!("Boom! {:?} exploded.", id.index());
diff --git a/examples/games/game_menu.rs b/examples/games/game_menu.rs
index 76d44ad368bb2..5a7ebe3b49a4a 100644
--- a/examples/games/game_menu.rs
+++ b/examples/games/game_menu.rs
@@ -743,7 +743,7 @@ mod menu {
                                     button_text_style.clone(),
                                 ));
                                 for volume_setting in [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] {
-                                    let entity = parent.spawn((
+                                    let mut entity = parent.spawn((
                                         ButtonBundle {
                                             style: Style {
                                                 width: Val::Px(30.0),
diff --git a/examples/stress_tests/many_buttons.rs b/examples/stress_tests/many_buttons.rs
index d85d25e2c4a97..027a4af20c039 100644
--- a/examples/stress_tests/many_buttons.rs
+++ b/examples/stress_tests/many_buttons.rs
@@ -257,7 +257,7 @@ fn spawn_button(
     ));
 
     if let Some(image) = image {
-        builder = builder.insert(UiImage::new(image));
+        builder.insert(UiImage::new(image));
     }
 
     if spawn_text {
diff --git a/examples/stress_tests/many_cubes.rs b/examples/stress_tests/many_cubes.rs
index 8bedf19ac6f9c..7061596801858 100644
--- a/examples/stress_tests/many_cubes.rs
+++ b/examples/stress_tests/many_cubes.rs
@@ -177,7 +177,7 @@ fn setup(
             // camera
             let mut camera = commands.spawn(Camera3dBundle::default());
             if args.gpu_culling {
-                camera = camera.insert(GpuCulling);
+                camera.insert(GpuCulling);
             }
             if args.no_cpu_culling {
                 camera.insert(NoCpuCulling);
diff --git a/examples/stress_tests/transform_hierarchy.rs b/examples/stress_tests/transform_hierarchy.rs
index 39fc5f001f0ca..229b70a874080 100644
--- a/examples/stress_tests/transform_hierarchy.rs
+++ b/examples/stress_tests/transform_hierarchy.rs
@@ -413,7 +413,7 @@ fn spawn_tree(
                 && (depth >= update_filter.min_depth && depth <= update_filter.max_depth);
 
             if update {
-                cmd = cmd.insert(UpdateValue(sep));
+                cmd.insert(UpdateValue(sep));
                 result.active_nodes += 1;
             }
 
@@ -426,7 +426,7 @@ fn spawn_tree(
             };
 
             // only insert the components necessary for the transform propagation
-            cmd = cmd.insert(transform);
+            cmd.insert(transform);
 
             cmd.id()
         };