I am using Bazzite 43 with a Nvidia GTX 1650 graphics card. At least twice now, I have had a total system freeze without warning. I had some web browser windows runing, YouTube music playing, and a terminal text editor open along with Discord.
I kept System Monitor open because of the last time this happened, to make sure I was not running out of RAM. With 16GB total, System Monitor showed only about 50% used today when the freeze happened.