>What was the failure? This isn't a retrospective that makes any sense. Windows Phone had great, snappy, intuitive UI (which was really surprising coming from

>What was the failure? This isn't a retrospective that makes any sense. Windows Phone had great, snappy, intuitive UI (which was really surprising coming from Microsoft). However it had no apps. If you look at the top 10 iPhone apps in the app store, only Facebook and Netflix were officially supported on the platform. I recall there being (great) 3rd party apps for apps like Instagram, but there was a dearth of anything else.