You could totally have one app store to rule them all (front end \neq repos). Also, this whole "fractured with side markets" sounds massively overblown. On the

You could totally have one app store to rule them all (front end \neq repos). Also, this whole "fractured with side markets" sounds massively overblown. On the android side other app stores are allowed. Yet, almost nobody goes out of their way to add any app store that was not preinstalled. And those preinstalled at most include one by the phone manufacturer, i.e. apple in this case.