They serve completely different purposes and are not mutually exclusive. The main takeaways from the ublue stuff is how they build immutable OS images and focus

They serve completely different purposes and are not mutually exclusive. The main takeaways from the ublue stuff is how they build immutable OS images and focus on container-based development workflows. Omarchy is all about ergonomic desktop configuration. They are both cool projects. You could easily replicate the container-based development workflows on Omarchy with distrobox even if you won't be using an immutable OS image. With more effort, you could replicate the Omarchy desktop configuration on a ublue image. Someone already ported Omarchy to nixos. I think we will continue to see a lot going on with immutable, reproducible operating systems and Omarchy will kickstart some cool stuff with desktop configuration.