Thanks. From what you say it seems that there is not much value in rewriting a well designed angular 2 app (using material design guidelines) in Ionic 2. I was thinking that using Ionic will help in avoiding apple app store rejections because of the Apple's stringent UI design guidelines.

@maruru: that's just a matter of preference about how you want to organize your code I feel.

But : An object can have data and pure functions.

Isn't that v costly? Can a company petabytes of data have a beta with same data?

It seemed like you implied oop and fp as opposing paradigms. They are really orthogonal.