I don't know man, i have a bunch of computers, the oldest one is a 2012 macbook, then various laptops from different brands (hp, dell, lenovo), an intel nuc from 2016 and a minisforum using a ryzen 7 that i bought just before the ram craze (phew)

all these machines run debian trixie with KDE and i think i only ever seen glitches once, or twice in only one of them. I think the macbook. Granted, all devices run from the internal GPU, intel or AMD.

The only time i saw kde "krash" a lot was when i was demoing arch in a VM, to see what the fuss is all about that distro. But i don't know if it was virtualbox, or arch.