Microsoft windows on mobile failed. One of the biggest reason was lack of external services and apps. If Adobe stop working on MacBooks, they won't be lucrative to many people anymore. And Adobe won't build for an OS without users. It's the same problem as social media but worse.
Early market movers have an advantage and that will keep growing.
Another reason why many hospital systems, military, etc department pays microsoft to support XP. Those OS aren't "better". Most people using them won't choose them over windows 10 or Mac if given the option.
It failed because Microsoft gave up on it, while not having the patience (and money) they had with XBox.
Windows Phone was already reaching 10% mark when they gave up, and were the Android alternative to many Europeans.
The proof being that in what concerns tablets, most people around here not carrying iPads, are carrying 2-1 Windows laptops with detachable keyboards, not Android tablets.
Early market movers have an advantage and that will keep growing.
Another reason why many hospital systems, military, etc department pays microsoft to support XP. Those OS aren't "better". Most people using them won't choose them over windows 10 or Mac if given the option.