I mean I don't know if I was responsible for that entire 0.02% of less than 4GB? But I had someone give me a mega-potato Core 2 Duo notebook with 2GB in it (and I ended up with a second one with 3GB). Yes, I got the message on them to submit the info to the Steam Hardware Survey! No I'm not crazy enough to actually try to RUN any Steam games on there... OK I admit I did (edited Proton settings to disable Vulkan use and use the OpenGL-based WineD3D instead..), and it was horrible. But it has a REALLY nice keyboard, trackpad, and screen, and the Steam Remote Play on it is silky smooth!
When I have a friend over and we both want to game (often Deep Rock Galactic, highly recommended!), instead of being holed up in front of my desktop, I can play on the couch on one notebook remote play and he can play a game directly on the newer notebook.
My real gaming systems, my modern notebook has a 11th gen Intel CPU with "Intel Xe" graphics and 20GB RAM. Mesa driver for it is very good, full OpenGL, Vulkan, and so full DX9/10/11/12 (except raytracing I think) for Windows games. My desktop has a Coffee Lake i7-8700, 32GB RAM, and Nvidia GTX1650. Those both have Ubuntu 22.04, haven't ugpraded them to 24.04 yet.
(With stock Ubuntu 24.04 it booted to desktop with about 500MB RAM free; with KDE (I didn't reinstall Kubuntu, just installed the kubuntu-desktop package) about 1GB.) So barely enough to run Steam, let alone Steam AND a game. Besides the GPU having virtually no 3D capabilities (OpenGL 2.1/DirectX9 with almost no shader capability.. shader model 1?).
Shockingly, this 18-year-old GPU in this thing isn't just "still supported" by some driver they didn't remove yet, it's supported by the fully modern Mesa Gallium 3D drivers written from scratch within the last 4-5 years. Which doesn't affect it having virtually no 3D capability by modern standards but is still remarkable that support extends back THAT far.