I'm in complete agreement with you. I use i3 (still using Xorg) and find the ability to have multiple desktops that I can move atomically between monitors to be far better than having to position windows individually. I put reference material, chat, etc, on the side monitor and then can very quickly move it back to the primary monitor when I need it. I find a normal 16:9 monitor to be just right for two side by side windows, or a tile of three, with one tall window taking half of the screen and two terminals top and bottom on the other side.
I hate using the mouse to manage windows, and having one huge ultrawide just feels like a nightmare to manage -- I'd need some way to split it logically into 2 or 3 virtual monitors.
With i3/Sway having the limitation of 1 workspace per monitor AND each app only being in 1 workspace, I could still use that logical splitting at times even on normal 16:9 displays.
I hate using the mouse to manage windows, and having one huge ultrawide just feels like a nightmare to manage -- I'd need some way to split it logically into 2 or 3 virtual monitors.