Unless someone vibecodes a new OS and convinces everyone to use it, we're stuck with what we got. Reaching feature parity with Linux and then debugging it to the point where it'd be usable is a gargantuan undertaking.
Obviously Omarchy's kernel, Wayland, and the Hyprland compositor are not Rust and work just fine. If you've seen any of DDH's public speaking, he's willing to burn tokens to Rust all the things, don't tempt him! That was the joke, people.
I am pleasantly surprised to be daily driving Omarchy with minimal friction, by the way. For a relatively new Linux OS, this is no small feat.