that's the beauty of xmonad-style switching without being pinned down per workspace or monitor.

i.e. if i have virtual desktops 1-2-3 on my 3 screens in order, I can switch out 2 for 4, but 1 and 3 stay put, so 1-4-3. if I want 1 to be in the middle now, I will switch 1 and 4, then I have 4-1-3. Now I can get 5 onto the left and have 5-1-3.

And it does not matter if I have a single big window, or whatever tling wm layout.

The point is that everyone can work however they want. When I use a tiling WM, half my screens/virtual desktops are fullscreen and half are tiled. sometimes 50:50, sometimes in other ways.