Such a missed opportunity. I loved Windows Phone and Cortana was good enough at the time but now with Bing AI I wonder what Cortana could really have been.
They'll shut down their Bing AI too, as soon as they fail to make it an advertising platform. Doesn't matter if customers find it useful, if it cant earn them ad money.
I also really liked it. Haven't had it myself but my mom did, the UI was great and what killed it was the lack of apps, not because the phones were bad.