Here's the thing: they're not! The reason those users where crashing was because something, somewhere (possibly in the graphics stack) was reserving ton of space without using it. We had crashes on file with 20+ GiB of free physical memory which was the reason why I started looking into why a machine with so much free memory could suffer a crash.
I hope I described how this whole things work because Windows memory management is not well known and some things about it are counter-intuitive; especially if you're coming from Linux.
I hope I described how this whole things work because Windows memory management is not well known and some things about it are counter-intuitive; especially if you're coming from Linux.