Please don't think about OAuth2 as about the next generation of OAuth1. They are completely different like colors: OAuth1 is the green version, OAuth2 is the red version The biggest OAuth1 provider - Twitter. I bet ($100!) they are not switching to OAuth2 in the near future. Pros and cons: + becoming compatible with the rest of social networks - making authorization flow insecure, like the rest of
![OAuth1, OAuth2, OAuth...?](https://cdn-ak-scissors.b.st-hatena.com/image/square/b90c897c6b831d7d75eff290fa7fe82b03982981/height=288;version=1;width=512/http%3A%2F%2F4.bp.blogspot.com%2F-i9ejlqSuRq0%2FUSxiT74p6JI%2FAAAAAAAABog%2FeKzqphKSHRY%2Fw1200-h630-p-k-no-nu%2Fsurface.jpg)