Excellent point. For example, I almost never need to search or look up documentation for React. But for Angular 2, I can't do anything without looking up the d

Excellent point. For example, I almost never need to search or look up documentation for React. But for Angular 2, I can't do anything without looking up the documentation (at least they did an excellent job writing it). So I would say you are right that StackOverflow is a better indicator of complexity than popularity.