Comment by wiseowise

The spec for wp8 was a lot higher than wp7. There was a bit change from WinCE kernel to WinNT kernel, etc. Without much confidence, I think wp8 was dual core or higher and wp7 was single core... and maybe there was a ram upgrade too.

All that said, WP8 did a lot better than WM10, where the WP8 phones were promised to be upgradable, and then the promise was walked back for low mem phones, and the experience was poor for qualifying phones anyway.

The final build of WM10 was actually ok on my Lumia 640; but that was way after everything was canceled and mobile Edge (this was the first non Chrome Edge) was still less usable than mobile IE, even though the renderer was better.

The really poor rollout of wm10, plus the tradition of forcing developers to make split builds to support multiple versions of windows phone/mobile made things pretty bad at the end. Calling the build for WM10 only 'universal' was icing on the cake. Android has all sorts of problems, but you can have a single APK that works on lots of versions, with some amount of new features get pushed to old OS with libraries and some new features have to be detected at runtime and use alternate flows. On the other hand, Microsoft kept making new features require using new foundation libraries that were unavailable on old phones. WinCE -> WP7 -> WP8 -> WP8.1 -> WM10 was too many step changes and developers bailed at each one. Meanwhile on the desktop, a 32-bit win32s application targeting windows 3.1 has a good chance of running on windows 11.

Also, they managed to make upgrade from wp8 to wm10 break installed apps sometimes. That wasn't great.

#notbitter

Retailers couldn't sell what the carriers didn't want on their networks. The carriers had momentum from consumer demand to keep selling iPhones. The carriers were given a lot of the "keys to the car" by Android and carriers were really happy with the ability to modify Android and/or micro-manage it, so they had a lot of incentive to focus on Android.

In the US, Windows Phone tried for the "iPhone experience", which made carriers unhappy and less likely to want to sell it, which ultimately left it the case in the US at a point where only one US carrier at a time was even "exclusively" selling the latest Windows Phone hardware, and only through its dedicated retailers. It took too long for Microsoft to also realize that part of the iPhone plan in the first place was direct to consumer sales and pressuring the phone carriers to provide SIMs rather than making "exclusive" hardware deals with carriers and hoping other carriers would try to compete for buying your hardware as well.

That was the final nail in the coffin. The reason why they didn't hit adoption in the first place is because Google prohibited their application on MS devices. Mobile YouTube already wasn't good enough, and without the rest of the GSuite (Maps, Gmail, Chrome, Calendar, Translate) it was dead in the water. And no, HERE maps and third-party clients were not good enough to tip the scale.