This morning I woke up and discovered my #Ubuntu had magically switched from #UnityDesktop to #Gnome (several months after install). Looked great, better native screenshot commands, Play & Previous/Next Track keys finally work.

But many small issues arose: unable to remap Calculator key, some custom .desktop files stopped showing icons and are not lockable on dashboard, cursor disappears in Chrome on click (?).

I rebooted to at least fix the cursor, and... it started on Unity desktop again.

@leyn I thought Unity DE is discontinued like 5 years ago, and they switched to Gnome as default... idk how you still using it.
@danil I kept upgrading from 16.04 I think, and Unity desktop just kept running... At some point I wanted to switch to Gnome to be closer to a clean Ubuntu install but it was never recognized. Even now I cannot choose my desktop on the login screen as I used to in 2014. I just gave up and decided to make it work until it's broken (wait it's already half-broken with no window snapping and no Play Music shortcuts) and do a clean install, but waiting to have a new computer first to be safe