> Our goal with Angular 2 is to make the best possible set of tools for building web apps not constrained by maintaining backwards compatibility with existing APIs
> This is not a big-bang rewrite; we will continue development on the master branch, and roll out changes incrementally on the 1.x release train. The 2.0.0 release will simply remove features that have been deprecated between now and then. Our goal is that you can move your Ember app to 2.0 incrementally, one sprint at a time.
Compare http://angularjs.blogspot.co.il/2014/10/ng-europe-angular-13...
> Our goal with Angular 2 is to make the best possible set of tools for building web apps not constrained by maintaining backwards compatibility with existing APIs
vs https://github.com/emberjs/rfcs/pull/15
> This is not a big-bang rewrite; we will continue development on the master branch, and roll out changes incrementally on the 1.x release train. The 2.0.0 release will simply remove features that have been deprecated between now and then. Our goal is that you can move your Ember app to 2.0 incrementally, one sprint at a time.