You can't lose customers you never converted in the first place.

Does React really eliminate the potential for buggy implementations? Also I'm fairly certain that UX has more to do with design than your choice of frameworks.

You also have to consider what side benefits libraries provide. Eg, we're likely choosing React (first time in company using React) because we're choosing React Native for our mobile apps. This is because we're a very tiny shop, with very limited developers. We simply don't have the manpower to hire or learn both Android and iOS development.

Now, we reviewed a handful of iOS/Android abstractions, and React Native seemed competent - so we're using it for our first pass. Likely, we'll use it for the web frontend too, because we're using React Native. More familiarity can be a good thing.

As I discussed internally when we were choosing frameworks, if I was just choosing a web frontend it would never be React. It's not that I think React is bad, it's just that there are a dozen frameworks similar to it that are faster. It popularized a new good idea (vdom), but it's just not best in breed imo. Yet, having the same concepts and very similar codebase between mobile apps and frontend is a pretty big deal for us.

It may not eliminate them, but it's much better than my memory of developing interactive interfaces with lower level libraries like jQuery that force me to keep track of everything having to do with the DOM in my own logic.