I have about two years of experience with both Angular 1 and React. What was truly astounding to me was how while Angular required months of continually poring docs and Stack Overflow threads for every new thing I wanted to do, React took all of a week or two to get pretty comfortable with, and after that minor investment of time I was rewarded with dramatically increased development speed.

I will never go back to using a framework with an approach like Angular. Trying to abstract away the browser environment and have developers learn a whole new set of APIs with nearly the same level of complexity is just a fundamentally bad idea.