ClipperDefiance

The numbers are are probably scene numbers. Most of the ROMs floating around the internet come from various scene groups. Many older groups would number their ROM dumps (I assume in the order that they released them). Additionally, different groups often had different numbering systems. From what I understand it’s a practice that’s mostly fallen into disuse since it doesn’t really help.

The pre-installed stuff is also often configured in a way they leaves it with massive security holes.

It’s literally this one techbro’s personal vibe coded Arch setup. Also, the guy is an all around awful person.

The only immutable distro I’ve tried is Bazzite. It’s gaming-oriented, but can work well as a desktop. It also does offer a KDE edition, but for some reason they intentionally ship with some GNOME programs instead of the KDE ones. For example, a fresh KDE edition installation includes Ptyxis instead of Konsole.

Also, DistroWatch’s search has the option to only show immutable distros. It’s under the Distribution Category option. I figure that might help you find a few more options.