Gregory's Server@miguel TBH, not everyone has the privilege of choosing what (or if any) framework they use. Do what gets you hired, first and foremost, while also continuing to work on the fundamentals (HTML, CSS, JS, accessibility, performance). And working on the fundamentals pretty much never ends, at least I have found :) But they will carry you into and beyond any framework.
@miguel Like, just for transparency, I write React at my job. I don't have the paygrade to completely shift that work to somewhere else. The "gaps" I specialize in (accessibility, UX) and what I think makes me a good engineer aren't specific to React, though. The same for my teammates; the things that set them apart aren't specific to a framework. That's just our job right now.