It's an arch installer that has its own set of optimized kernels id you want them, but also has a great kernel manager so you can pick different optimized ones or defaults or even hardened options. Plus it does BTRFS w/ snapshots set up for you, which helps deal with the Arch ecosystem's rate of updating
Have fun with CachyOS! It's what I'm using as my daily driver right now. Protip for BTRFS: learn how to rollback to a previous snapshot before you need to. It makes it a lot less stressful.
A random facebook admin says it was verified by Phison engineers, it doesn't sound like the reporter actually spoke to anyone from Phison