Re: It was...
More than just 7-8-10, Windows Mobile 6.5 with the excellent HTC HD2 and HD Mini were some of the best devices on that platform and had MS's first app store, but they killed that when they went to "Windows Phone 7 Series", and by the time 10 support was killed off they'd been through Visual Studio and Xamarin as well as announcing and then withdrawing the bridges for porting Android, iOS and Web apps to Windows Mobile. Plus universal apps would also require a re-write to support continuum.
Given the projected user base even if it had taken off, it's hardly surprising most companies left their devs focusing on Android and/or iOS.
Biting the hand that feeds IT
