[ecmascript]

Well perhaps, but I think it's so overly complex and verbose to the point that learning it and making sure that everyone working on the project is on the same level is hard or near to impossible.

I really tried to learn RxJS, I used a lot of different methods like filter and what not but I still got into a huge amount of issues but honestly a lot of that was because angular was not really fit for the type of application we were trying to build. Especially as we relied heavily on query params for state. There were many strange behaviors of Angular Router that I ran into several times. It has some kind of own internal state and fires updates in an unexpected way. I remember sitting hours just to try to get the query params to update correctly and I was not the only one having these kinds of issues.

Even if I agree useEffect is unnecessary complex, it's still far far away from being as complex as RxJS and Angular. I remember I was trying to add some pipe service or whatever it was called and it was near to impossible to achieve what I wanted to do which would be trivial in any other framework/vanilla JS (unfortunately I don't remember what it was).

Then using third party stuff in Angular is a nightmare as well. You have to deep dive into how it's being built to make sure all the stuff is brought into the build step etc. The configuration is a nightmare if you want to do something special like making use of Angular Elements that's barely documented at all.

I never got to use the Signals feature, because I left the company before it got introduced into Angular.