No, what the Linux kernel does instead is randomly kill user processes :)

It's kinda infamous for that, and had held up Linux adoption for a decade or so.

But you sort of missed the point, I think. The comment chain was about speculating why KDE could possibly crash if there was faulty RAM while other software would be fine. And the kernel absolutely crashes when there's faulty ram.

Right, yet it's KDE that is crashing with extreme regularity, and never the kernel.