The React API has also been very stable. I copied and pasted code from years ago and it works perfectly. Angular 18, 19, 20, 21. I don’t even know the right way until I Google for everything. Camel case attrs? Dashes? inject? It’s starting to solidify, but not yet.
One “issue” is that people might feel React is not progressing. But in a world of daily npm updates, I’m OK with that!