I tried states_rebuilder early on. I liked that the business logic didn't need to depend on on Flutter or any external packages. The reason I ended up not continuing with it is because I got stuck at one point and couldn't figure out the solution. I have no doubt, though, that it's a good state management package and I'm sure many people are using it successfully.

However, states_rebuilder still has quite a large API on its own so I wouldn't classify it as a minimalist's solution.