Yeah, I go back and forth between Ubuntu and Debian on various machines and I usually hardly notice the difference in terms of my day-to-day. I just have in the past treated Ubuntu as a Debian with a fancier installer and default desktop. But the push towards snap is frustrating me.
Unfortunately Ubuntu pushing Snap means that 3rd parties that would have produced debian-compatible packages before are now moving to just shipping snaps instead.
e.g. I went to install Slack the other day and saw they only have RPM and Snap options now, they removed the deb entirely from their site (but still mention it in their Linux-install instructions).
(And yeah, this could push me to the end of my 25+ years of debian usage, I could be tempted to switch over to NixOS.)