Everyone who had one said so. It was the best of all the “third option” OS devices. All the WebOSes and such.
But the market just doesn’t want a third option… even back then the Android and iOS were ossified
The only cool thing was the grid but that only goes skin deep. Otherwise I hated the phone. Maybe WP8+ devices were better but WP7 was a piece of crap. I didn't want to try WP8 and got myself a Jolla instead.
It's the app developers (and their companies) who wouldn't be happy with a third option, because the existing two cause enough problems, just think about how many frameworks for cross-platform app development exist, they were created for a reason..., and even with them you still have to do OS-specific stuff to tackle different app store policies, different privacy features, updated APIs breaking your app on new OS versions... or you can have two entirely separate teams working on two separate codebases and try to keep the feature parity...