[Nemcue]

The difference is that you're spending time learning about concepts that you are unfamiliar with, as opposed to learning Angulars many APIs.

For instance if you've already spent time learning about Redux you'll have a very easy time re-using those in Angular 2 (with ngrx).

[shriek]

Absolutely this. While it might be tedious to put those pieces together at first the knowledge that you gain is very transferable to the other app that you build instead of being one-trick pony in angular.