I mostly stick to things in the repos, if theres something I want that’s not yet packaged I package it myself because Gentoo packages are fancy bash scripts with libraries (eclasses) to handle the normal make && make install sort of things for most build systems

I still use X11 because one of my necessary voip apps (mumble) doesn’t yet support wayland’s method of global hotkeys.

Otherwise I don’t particularly care one way or the other.

kubuntu is already literally just a package.

if you just install kubuntu-desktop (or something similar) from any buntu flavor you get it.