Earlier quoted context omitted.
Apple keeps doubling down on platform specific services and APIs but as their market share dwindles this becomes increasingly untenable. Porting Apple Music to Android was a step in the right direction but they have a long way to go in the new world where services are more important than devices.
How do you mean it dwindles? It seems to hold steady and increase in some countries. This is a somewhat recent figure I found. https://9to5mac.com/2017/01/11/ios-market-share-kantar/
http://fortune.com/2017/05/23/apple-iphone-gartner-market-sh...
But the essential point is that nobody can afford to ignore Android and building to iOS-specific APIs doesn't make sense.