I would guess in typical DHH fashion he would say it is Open Source. And I don't understand where this just Arch + Hyprland installation is coming from?
They have also customised the OS / distro so it install in less than 2 min on a super fast USB. Getting Laptops, both Framework and Dell are now on board, tested on Omarchy so they work out of the box. And so many other tiny things that just make the experience better. I say better but to most consumer, those are expected in the first place.
And this "expectation" people have been waiting for more than a decade.