AFK leveling my summon skill in Valheim on my second display while actively solo farming raids in Fallout 76.
It's nice that Valheim has a setting that automatically lowers the game performance while it's in the background, not many games have that. I miss that the Nvidia driver on Windows had a setting that could force a lower frame rate per game while it's in the background. I don't doubt that on Linux you could write a script for that but I can't be arsed, not to mention that the only game I need that feature right now already has it.