[phaedryx]

I like React a lot and I sometimes use it for my own projects (e.g. I just finished https://techadequiz.com/)

However, I don't think React does "add some Javascript behavior to my Rails views (or backend framework equivalent)" very well (which is what I think Stimulus is trying to do). I mean you have solid support for React in the Rails ecosystem, but you turn your HTML-rendering responsibilities over to React Javascript functions.