I agree with the second paragraph. It seems that we're constantly pushing to make developing mobile apps easier for people with a web front-end background, in doing so tying them into using a stack of frameworks that in my opinion is far enough removed from 'web' that it loses sight of the core advantage - that it is easier to learn and develop with than the 'native' alternatives.

I wonder if by the time you get to this stage you wouldn't be better off investing the time in actually learning the native languages and toolsets provided with them. I am also concerned about how much you would be tied into doing things the, in this case, Supersonic way. The scaffolding for example looks interesting, but is it actually useful in a real-world application?

I don't have experience with Supersonic, I do have experience with AngularJS + Cordova mobile apps (I built the front-end of the RuneScape Companion app) - and I think if I were faced with building a similar app again I would think very very carefully about investing time into learning a stack of frameworks such as this.