OP here: The README.md assumes the reader knows what CachyOS and Omarchy are. A quick primer for those who are coming to this fresh...

- CachyOS is an Arch-based Linux distribution with built-in performance optimizations tuned to high end computing and gaming. See more at https://cachyos.org

- Omarchy is a Hyprland-based "desktop" crafted by DHH that is slowly turning into its own distribution, also based on Arch. See more at https://omarchy.org

Why would you want to use this instead of vanilla CachyOS?

You want to use Hyprland and want a very strong starting configuration. CachyOS includes its own configuration of Hyprland, but I find it's pretty anemic. There are other pre-packaged Hyprland "spins" to try as well, including MyLinux4Work ands JaKoolit. I've found Omarchy to be the most refined. If you have no interest in Hyprland, neither this script nor Omarchy are for you.

Why would you want to use this instead of vanilla Omarchy?

You prefer CachyOS's defaults and/or enhancements to vanilla Arch, or you do not like all of the out-of-the-box decisions Omarchy makes via its auto-install of Vanilla arch (such as LUKS disk encryption or the enforcement of a single user login.)