I'm running Ubuntu on a 9950x3d and 5090 and it is not slow. Games in Steam with Proton are buttery smooth.
One hiccup was I had to disable variable refresh rate because moving the cursor didn't "count" as a reason to update the screen, so moving the cursor on its own (rather than e.g. moving a window) looked choppy.
But a choppy mouse cursor isn't "slow".
Tip: if you have a performance problem, run Claude Code (or an AI agent of your choice) and ask it to investigate.
Everything, huge input delay in every interaction, clicking on anything, opening menus, typing, tabbing between windows, everything had 1-2s of delay.
>disable variable refresh rate
I think I tried this but dont recall, there were a few things related to monitor refresh I tried that probably included this
Without having to google whether it will, or what hardware to buy.
Without having to google some workaround or configure anything to get the most of it.
You should buy preinstalled the OS you want instead.
Microsoft took a more difficult path. They have close contact with OEMs, run certification programs etc. A massive apparatus to make it somewhat likely that hardware will ”just work”.
Both of these are valid models. I’d be happy to use either. I’m not very keen on doing this work myself though. I can buy a PC with Ubuntu but then it’s still hit and miss if I buy something new for it. There is no canonical store selling canonical gear like the Apple Store