I had a Windows phone and android simultaneously - I actually liked the UI on the windows phone but I think I may have been the only person on earth that did because I virtually never saw another one. From that perspective, I can understand choosing not to build for the platform.
I can understand not wanting to build an app yourself, but when you hold a monopoly on internet video and you won't allow your platform competitors to build an app on their own dime, that really should have triggered antitrust action.
I can remember Google taking similar actions to lock out Amazon's Echo Show.
