I had some problems caused by different package versions between main workstation (Ubuntu) and Debian. Deluge refused to connect in thin client mode because the version in Debian was older and incompatible with newer version in Ubuntu. I had a server upgrade coming up, reinstall was in order anyway, and I decided to just go with Ubuntu. Livepatch is nice as well, and although snaps aren’t great, there is usecase for them as well sometimes.
No, I don’t think so. Should I? I have a vague memory about seeing Jamendo in Rhythmbox when it shipped in Ubuntu by default. It was a long time ago, I didn’t even know it was still a thing.