Vue
This was my main frontend framework, where reactivity looked like magic.
Why?
By the time Vue 3 was stable and was supposed to work well with TS I was already working with React, since that was the best way to achieve mobile apps using (using React Native).
I still think Vue‘s implementation of reactivity is superior to React’s… but now it’s too late - and I really appreciate the fact that it’s plain TS, instead of adding another abstraction layer on top of the language like in Vue