It is also first in the Distrowatch rank
https://distrowatch.com/table.php?distribution=cachyos
I distro hopped to it from Bazzite a couple of months ago, and I could not be happier.
If you try the installer, be careful when selecting multiples DE/WM as the conflicts were not listed anywhere for the installation process.
Picking a single environment and then adding the others later was what worked for me.
iirc it started as a spinoff since vanilla arch preferred to stay conservative in regards to compiling packages with “the new” cpu optimizations. They are not so new at all, but since it meant breaking support with old hardware… Hence, the dillema that called ina fork and here we are.