For me, after finding out the core concepts of React (views are pure functions, functional composition etc.) are actually functional programming applied tastefully to rendering, I finally realized the elegance of functional programming, and since than I've been merging these concepts into my programming methodologies.
Similarly, I'd give a shout to MobX for showing me how observables can be used in practice. For the longest time I'd wanted to learn it, but I'd choke on the syntax and the generality of common libraries. Showing how MobX worked to simplify React code, gave an instant sense of success and things clicked afterwards.
It's a start... because it brings the concept to Javascript, a language that I'm already familiar with and have a build chain for.
If one is going to switch languages, then you can consider the whole sweep of compile-to-JS languages. Elm is pretty nice in that scenario, and pairs well with my use of Elixir on the backend.
And sadly that's the biggest problem the upcoming languages/frameworks face.