[0]: https://www.microsoft.com/en-us/windows/continuum [1]: https://www.howtogeek.com/183766/why-microsoft-makes-5-to-15-from-every-android-device-sold/
2) Insufficient Apps: they did not get enough developers creating applications for the Windows Phone ecosystem to have a compelling enough platform that was self-sustaining. They even started to build "app bridges" to make it easy to port Android and Apple apps to Windows Phone, but ultimately gave up after a few years of trying with little to show for it.
The phones actually were pretty good. The Lumia 920 was really amazing.
https://www.linkedin.com/pulse/20140817131527-27177208-core-...