Just spent about 50+ hours on learning Angular 2 and curious how other feel about this framework. Currently, it’s on RC3 release and they expect to be released in 1~2 months. At least performance wise, they claim 5x or 10x (I forget) better performance. There’s no more $scope and dual binding is no longer the default. Recommended usage is TypeScript but they support JavaScript + Dart. Please keep it Angular 2 topic alone… I understand there are other alternatives like React/Redux, Backbone, and etc… I only want to keep it Angular 2 specific.
As for me, I knew Angular 1 but never really built an application because I was using ExtJS at the time. Anyways, Angular 2 is now completely Object Oriented using TypeScript and really loving the ‘typed’ support from IDE like Visual Studio Code (awesome free IDE). Curious on the opinions of Angular 1 developer. I’m definitely going to use it on future projects 
No more ExtJS for me.