Comment by pjmlp

It was about 10% in Europe when they killed it, many people that could not go for Apple due to their prices where actually going for Windows Phone, because the native code (WinRT/.NET Native/C++/CX), provided a much better experience in low end phones than Dalvik with its lousy JIT was capable of at the time.

I was one of them, initially getting a Lumia as second phone even though as ex-Nokia I was kind of pissed off, developing for UAP/UWP grew on me and was much more fun than dealing with Android.

Now given how Microsoft has messed up the whole UWP, Project Reunion and WinUI/WinAppSDK I would assert there is no faith left.