Convert strings in flows to arrays/collections, concat, use map, reduce, filters, and more..!.
Use Invocable Actions to serialize record collections and deserialize them back after processing. So flows can now be as simple as Get Records -> Serialize -> Process using JS -> Deserialize -> Update Records
. Avoid loops and make your flows more linear. A sample flow is included.
Example 1: JS Only (No Record interactions)
Example 2: Get Records -> Serialize -> Add Phone and Type using JS -> Deserialize -> Update Records