[mellis]

Openness is indeed a continuum and different degrees of it make sense for different people and different situations. The problems arise when you claim to be more open than you are or become less open than you were. Apple is clear that it offers proprietary platforms; Google claims Android is open but isn't acting accordingly.

[nextparadigms]

It's not so clear on Apple's side either. They can be even more closed if they want to, and they proved it recently with the subscription tax, which also wasn't in place since the the beginning when those developers made their apps for iOS.