Mastering the nunances of state including:
- Dependency Injection of the MVC-Model or MVVM-ViewModel
- Immutable Models
- State Management in the form of auto wiring the observers
And keeping the update UI to the confines to the Flutter SDK. Its a process of understanding why immutable models are better and how the Flutter SDK provided notifiers are just not fully equiped to handle the complex models of Set, Map, Collection, etc.
AI has fed Reddit, Stackoverflow, Google Search, Bing Search, etc with not correct answers in solving the problems you need to solve when developing Flutter apps. And to compicate things there are parts of the material design spec not implemented in the Flutter SDK and the Flutter GDE's are shying away from creating detailed articles on how to solve those things including how to implement an adaptive and responsive scaffold that supports canonical layouts.
A better way to get the answers you seek is read my substack articles and become either a substack follower or subscriber at my substack: