I think Typescript can sometime have a mind of its own, but it's certainly an enrichment and with Rx everything just falls into place.

At this point it's hard to ignore that all the UI libraries are just paradigms and patterns, and how we use them is getting less important. These days I just want to write Component-style UI code, and I'll be fine.

Similarl things can be said about RxJS, but I think since it's a different level of abstraction, it will hit much harder, once it gains more traction. And it's already building up a solid community much faster than before. the only thing standing in the way of people learning RxJS is the same as Angular / Vue / React. It's scary and there's a lot of fatigue still. I hope that this year is thus going to be even better for teaching. ^^

Tldr; RxJS is going to be huge, if we can teach it more and JS fatigue calms down.