I've never seen a window manager that treats subdivisions of the screen like 1:1 physical monitors at the OS level. They generally just resize windows, take ov

I've never seen a window manager that treats subdivisions of the screen like 1:1 physical monitors at the OS level. They generally just resize windows, take over the entire monitor when you click "fullscreen", and display errors/prompts in the middle of the monitor, overlapping your other windows. Similarly, these subdivisions can't themselves host virtual desktop spaces. Surely there's some Linux window manager that does all of this and more, but I'm never going to fuss with that when I can plug in a few cheap monitors and they work the same way immediately and consistently, out-of-the-box, on any OS.