[pianoben]

Once upon a time I was a Windows Phone developer, and I can confirm that it was monstrously difficult to write stable software for that platform. Many documented APIs just didn't adhere to their contracts, and you'd only learn by trial-and-error or, if you were lucky, by tracking down the Microsoft employee who wrote the API you were working with.

As much as I loved the UX and rooted for the platform, the apps were just bad. Even first-party apps were depressingly crashy.

This was circa Windows Phone 8; maybe it improved with subsequent releases.