The react ecosystem does move really quickly. I think what's important to realize is that even though it moves quickly, if you learn the correct principles you'll just be stuck with minor API changes rather than architectural changes - which is a huge difference. I tried to approach the course from this point of view as well. Even if the API changes a little bit, the overarching methodology of building your UI will be the same. Someone who did the amazingly was Dan Abramov in is egghead series. Learn concepts, not libraries.