Yeah, what about Windows Phone? From a user's perspective it felt like it was good, very good even, but MS kind of... gave up on it suddenly? Like they pulled a google on it.
We actually released an app for WP7 and then just as the platform was starting to get traction, they released WP8, made it backwards incompatible and told everyone to rewrite their apps. It killed the platform overnight. Maybe you can get companies to take a chance on a new platform once, but you can't then deprecate every device and app a year later and expect everyone to do the same thing again