I tried Angular 2+ back in the day. I found it frustrating to learn as the API had changed between versions, and when searching for help you would come across a blog post/stackoverflow answer, start implementing it and realise it didn't work in the version of Angular your project was in. Frustrating.

Tried React afterwards, this frustration didn't really exist and it was much easier to pick up.

The frustation is pretty much there under Vercel's stewardship, especially when React comes in the shape of Next.js.

It is apps or pages, which supports what, what new use cases is "use..." now for, ....