How to Migrate to a Medium Sized App

I'm not anti-reducts by any means, but just happened that I was in this project where the implementation of Redux was just super messy. So we tried to combine feature development with refactoring some of this state management stuff. And it worked quite well for us because after a few months of doing this, we realized how to structure the application such that it works well for our use case. Yeah. Do you have any other tips on the migration path? Did it go super smoothly? Did you have like an attack pattern for how,. I don't know how big the app you worked on is, but I know those sorts of migrations for even medium sized apps can be