I mean...

They have GUI system upgrades, this is kind of a pain in Debian

Okay, now I updated 12 laptops from Ubuntu 22.04 to 24.04 and...

• it always hangs at "swap deb Thunderbird with snap", like, always. 12 times.
• the wallpaper is gone after the upgrade, every single time
• there are like 10 buttons to click
• you need to be a sudo user (the updater shows but just vanishes when being a nonsudoer!)
• on 2 machines some random repo issues caused a silent error. Needed to apt update in the terminal, fixed
• there are tons of snap packages, and all are outdated, yay! Installing those on a sudo account causes them to fail on the nonsudo account.

Damn this is bad. And this is like, the best of the best distros?

Doubt that. Fedora Atomic has way more potential, while only being user friendly as uBlue.