[incrudible]

> It would take more time learning how you start a React or Angular project…

That time has has already been spent, because you hired React developers. They will be fastest by pulling in React. Really, the argument could end here. Yes, there is overhead in using it, things can get out of hand, but they do not have to. If they do get out of hand, would vanilla web technology have prevented that?

[ragnese]

> That time has has already been spent, because you hired React developers. They will be fastest by pulling in React.

I'm not entirely convinced that this is true, either. At least not in some general, a priori, way.

Doing stuff "the right way" with React or any other framework probably still involves a fair amount of ceremony, boilerplate, and testing. Would your hypothetical React dev be faster with React than some other framework? Probably--if that other framework is similar in scope and complexity. But, otherwise, I just wouldn't assume that an expert in FrameworkX will always do better using FrameworkX without regard to the specifics of the project.

[incrudible]

It is true in context. They will be faster than if they did not use a framework for anything that has even a tiny amount of repetition or interaction. That is why we have frameworks in the first place. There is no right way. React itself is not much of a framework anyway. It is a fairly small library for reactive UI. You do not need to be an expert to be productive in it.