Stable? Good? Bad? Annoying? Is it beginner friendly? Should I try KDE or Gnome?
I’ve only used Mint and SteamOS and from what I understand KDE should be similar to SteamOS Desktop mode because that is KDE based, right?
I don’t plan to distro hop any time soon, but I’m just curious if I ever get a new laptop I might try it to take advantage of it supposedly being descent at performance optimisation


DE is just personal preference, you can’t really go that wrong with any of the popular ones plus you can easily change it later without a reinstall.
If you like the look and feel of mint then you can just use cinnamon on cachy.
I’d recommend KDE to most people.
I’m using cachy on my daily driver/gaming rig. Personally I like to use debian LTS on my other devices because I use them intermittently and don’t want to worry about keeping them up to date.