Personally it's Angular 2.0 for me. I'm a big fan of Angular 1.0 but can't stand how complex it has become. I want to be able to start using a framework in a matter of hours, not weeks. Most of Angular 2 complexity is unecessary and I write large SPAs ,not toys, but I don't like the noise. I use Go and Python on the server, I don't want to have to manage a Java style application on the client, because that's what it is another version of GWT with Typescript in place of Java.