These are manual tiling wms. So in exwm I can chose how to position and resize my windows any way I want. For example I can hit C-x 3 to split my screen in half vertically then C-x 2 to split one of the vertical splits horizontally. Now I have
+----------+-----------+
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| | |
| +-----------+
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| | |
+----------+-----------+
I can resize the vertical and horizontal splits, add or remove splits and cycle between the splits and the windows they display with regular emacs commands. The only thing you can't do is have windows overlap so you can only see part of their contents. i3 comes last in my preferences because it adds a bit more friction to this with it's concept of containers.It seems to me like that covers 99% of use cases. I don't see very much value in being able to only see some of a window when it is being overlapped. Especially when if I need to see only a few lines of a window it would only be a few keystrokes away. Maybe C-o 2 C-x 3 C-x - C-x b window title which looks crazy but if you are a heavy emacs user with ace-window and ivy mode it's very natural.