The HDR is fairly recent too. Before you had to jump through like 8x the hoops and also had to use gamescope which is another thing that could both improve and worsen the window situation. If you ever encounter a game where none of the other stuff works gamescope can force a monitor and separately force render and display resolutions for up or downscaling, but tabbing out or using other software like browsing to guides or modloaders have been kinda janky in some games.