Undoing isn’t a feature of a GUI though, but rather running in a context that maintains history/state. There’s no reason a command line program couldn’t do something like this in theory.
Why doesn't bash in a friendly system like Ubuntu have undo for mv.
The issue is that tasks on the CLI tend to be split between many different utilities. So you'd either need a standardized method for sharing an undo tree between the different utilities, or alternatively to integrate all the different tasks under a single program.
+ foo
+- bar.txt
+ bar
+- bar.txt
I mostly just use Ranger in a VTE to be honest. Cut/Copy/Paste and directional navigation of a tree using standard Vim keybindings is just more fluid than anything with a mouse could ever hope to achieve. Add to that dropping to the shell with `S` with my hands already on the keyboard and it's by far the best workflow I've come across.
Which makes it all the more infuriating to the user that they don't.
I also am not quite sure what the post above means by "GUIs support undo". Yes, most apps,e g., on Windows, support CTRL-Z for undo. But this functionality depends on each app implementing its own undo, nothing OS-wide, and results will vary. I'm not sure what there is in GUIs that supports "undo" other than an app/user convention like CTRL-Z, which hardly seems to rise to the level of "supports undo".