I've been on Windows Mobile since the launch of Windows Phone 7 back in Oct 2010. Back then I had a Samsung Omnia 7, after that a Lumia 800, then a 920, 930, and for the last couple of years the Lumia 950.
My wife is the same, having started with an Omnia 7, then a 820, 920, and her current phone is a 950XL. We both love our phones (not literally), but we wouldn't use anything else.
Windows 10 Mobile is the more intuitive OS, we have no app gap at all, having all the apps we need and use on a daily basic. I have over 250 apps / games on my phone, and am quite happy.
I have many friends who have jumped ship to Android, but even they still say they miss Windows Mobile's UI, how it's more user friendly, more intuitive, and fits into the Microsoft ecosystem much better than either Android or iOS can.
I, begrudgingly, bought an pretty decect, fast, Android 7.1 tablet purely to setup an alarm system, and I've tried to use Android on the tablet, and it often annoys the hell out of me. I find myself cursing and swearing at it for being so inconsistent in it's intuitiveness.
Android is "ok", but not a patch on Windows Mobile for ease of use. I'm not talking about babysitting me to use the OS, as I'm a dev, and happy using advanced features. The problem is on Android app navigation isn't consistent between apps, and for some apps not even within the app itself. The Google Play store app, a pretty major app on the platform, is bloody annoying when you've drilled down a few levels, and simply want to get back to the home page of the app.
I'm sorry but Windows Mobile is way better, just that the market never, and still can't see it. Yes Microsoft have messed up too, but that doesn't stop the OS from actually being better. Proven by the fact that both Android and iOS have actually stolen / borrowed numerous features from Windows Mobile over the years.
For myself an my wife Windows Mobile fits in with our lives much more. I'm also a gamer, PC, Xbox, Switch etc, but to be able to have something like 100 Xbox Live enabled games on my phone, and to get Xbox achievements whilst on the go is something that Android / iOS do not have (bar Wordament, SnapAttach, and Castle Siege)
So as per the thread topic, I've used Android albeit on a tablet, and within minutes I missed Windows Mobile (and Windows 10 in general), as Android just doesn't compare for me.
I'm waiting out for Andromeda and whatever that brings..