Re: Apple ecosystem
The user experience in the Apple world is more consistent between releases, and as much as it is tightly controlled, it helps stability-wise.
Going from Cyanogenmod on Oneplus One to their horrible own-brew OS, to Samsung's special brews, to Android generic, Android experiences are in some instances jarring and discombobulating. If Nokia manages to make their Android UI experience as consistent as Apple's, I am very tempted to switch to Nokia instead.