I’m using NixOS with KDE for HTPC, though I’m not sure I’d recommend it unless you’re eager to learn Nix.
The upshot is that it’s super stable, and everything is declared and versioned in the git repo, including my lirc device codes and node-red automation flow for lirc and mqtt. (The HTPC shows up as a mqtt switch in home assistant for turning on and off, and the HTPC turns on or off the TV and amplifier through IR as the PC turns on or off)
I mostly use Firefox and various streaming sites for video, and Spotify desktop client for music. A gyro mouse/keyboard is the main input device, plus wireless Xbox360 controllers for streaming games with Moonlight (from Flathub)






The article introduction is gold: