Your examples of engines are less about "it works" as more that it does a thing we couldn't do before and it works better than the previous thing. But neither of those are especially true of react.

React was an instant hit because it had the facebook brand behind it and everyone was tired of angular. But ultimately, react has worse outcomes for developers, users, and businesses. On the web, react websites are bloating. They run slower, their javascript payloads are larger, and they take longer to load.

Your suggestion -- that it works and then it gets more efficient later -- would make sense if we lived in a world where react moved off the virtual dom model. A virtual dom is a fine first attempt or prototype but we can do better. We know how. Projects like SolidJS do do better. React has not caught up, but it is still very popular. This whole "It worked badly, but it worked. Later came efficiency" thing is complete nonsense.

And there are loads of businesses that started off with an angular app, started to migrate to react, then started to migrate to react hooks, now switching to whatever the latest methodology is. Time and again you find these products, always endlessly migrating to the new thing, most of them never finishing a migration before beginning a new one. So these products end up being a chimera of four different frameworks held together with pain.

This isn't a good outcome for businesses, or for users, and it's not a good developer experience. react is stagnant and surviving off of being the default or the status quo and supported by tech companies that have long since stopped innovating and subsist on rent seeking. Developers choose react because nobody was ever fired for buying IBM and because they can look busy at their job, and because they buy a new phone and laptop every year with the latest hardware that can compensate for the deteriorating software they ship.