Earlier quoted context omitted.
Nokia also had a ex-Microsoft exec ( https://en.wikipedia.org/wiki/Stephen_Elop ) that had the goal of ensuring Windows Phone would succeed, and tanked Nokia with it. I was on the DVLUP project where Nokia and Microsoft attempted to inject energy into windows phone app development. We could see the tension between the two companies as we were a 3rd party contracted by Nokia to build the platform. The Nokia exec we we…
Was this around the time Microsoft kept switching what "windows phone" was? I remember that the one friend who got into it loved it, and then they released something completely incompatible and he abandoned the platform.
2010: Windows Phone 7 was still WinCE, but they removed full access to WinCE APIs, and got rid of PC style multitasking. They had a new UI framework for first party apps. Then for third party apps they had a port of Silverlight that imitated the new UI style. The latter had really terrible performance.
They had to base this release on WinCE because the NT kernel port to ARM wasn't ready yet. Blocking access to "good" APIs could be seen as a way to ensure app compatibility for the next release.
2012: Windows Phone 8 had the NT kernel. Also, windows 8 and windows RT shipped. But the silverlight-inspired UI framework of Windows 8 was different from the Silverlight fork from Phone 7. So you had yet another UI framework rewrite to cope with.