> Nobody can build anything if the ground keeps shifting.
I don't see the ground shifting. Most distros are just a skin on top of a mainstream distro (Omarchy is apparently just Arch).
Of course there are many things in the Linux world: people use a variety init systems (systemd, openrc, runit, s6, ...), libc (glibc, musl, ...), userlands (gnu, busybox, ...), display servers (x11, wayland), window managers (gnome, kde, cinnamon, xfce, sway, i3, ...), display managers, sound servers, package managers, file systems, bootloaders, shells, ...
That's just part of being Linux, and people having the freedom to use whatever they want. Sure, most people are not technically capable of building their distro of choice, so they jump between existing wrapper-distros like Omarchy. And that's part of the deal as well.