The rest is even more outdated than Debian, so just use Debian.
In general stable Desktops are not enjoyable. You will basically not want to read Linux News anymore as you wont be getting any of that.
Its good for enterprises, where policies dont need to change etc. Also in combination with Flatpak and EPEL it may work somehow, but its just worse than using some normal Distro I heard.
@Pantherina
There is a free subscription for RHEL for individuals.
And I think it's less of an issue nowadays with old packages since we have extra layers such as podman containers over distrobox, flatpak, snap, Nix etc.
Then you can have a solid base OS with less solid layers on top where things are allowed to break but don't mess with the rest of the system. I use Fedora Kinoite as my base for this exact reason.
Snaps are only somewhat secure on Ubuntu, at least to my state of knowledge. Only on Ubuntu do they have the Apparmor profiles to isolate apps.
I think Fedora Atomic is just better for most cases. KDE got their stuff together mostly (I will not want to use a stable version until 6.3 or something) and the rest of Fedora never breaks for me.