A little while ago, we saw one of Valve's contractors, Natalie Vock, release a new tool that prevents Linux from stealing your VRAM. Beforehand, when Linux had to free up room on your GPU's VRAM and move stuff to the RAM, it had zero context over which blocks of data were assigned to which apps. As such, it had a tendency to boot the game you're playing off the VRAM to help keep that one random Google Chrome window you have open on the GPU's RAM, which isn't ideal.