Not much. A horizontal split (C-x 2) can be quite useful to keep the top of a file in view while editing around at the bottom of a file. A vertical split (C-x 3) is useful when comparing files side by side. But that's about as far as I go, beyond that it just becomes annoying, as popups like from magit will show up in random subwindows, often rendering them unusable, due to that subwindow not being big enough.

As a counterpoint, I pretty much always split into 2+ windows. A 2-window setup is a code + terminal setup with shortcuts to run commands on the terminal(s). On more complex projects there are typically more than one terminal windows.

My org-mode emacs instance for note taking is split into quite a few windows: ongoing work task(s), generic "today's scratch pad", various topical notes files, etc.

On the posted topic: I don't know whether the transposition would be useful for me though - as the layout is set up by screen orientation then only a 180 degree turn would make sense.

perhaps i might interest you in display-buffer-alist ?

useful resources:

1. https://protesilaos.com/codelog/2024-02-08-emacs-window-rule...

2. https://www.masteringemacs.org/article/demystifying-emacs-wi...

3. <this space is for rent>

Seems like this new feature might help with that, if magit takes over or creates a new window, you can rotate or flip your window arrangement until it's in a usable space (if it works like most tiling window managers, which isn't entirely clear from TFA).