I owe an apology to @davidgerard for being so skeptical about Linux on desktop. I installed CachyOS and it works. I have a HDMI 2.1 monitor and a USB soundcard on a KVM and switching back and forth works. I plugged in a Thunderbolt cable and Thunderbolt network just works. I ran Splendor, a simple Steam game and it just works. I still haven't configured a single thing. (Except some self inflicted IP trouble.)
Let me assure you: when I abandoned Linux ten years ago it. was. not. like. this.