> But I would imagine that users of Emacs 28 and earlier would rather enjoy
> the new command (with a 'g' caveat) than have it disabled.
>
> As a safety measure, in older Emacs you could also set
> 'revert-buffer-function' locally to something displaying an error.
>
> I don't remember using 'g' in ibuffer or list-buffers much anyway. But that
> depends on one's habits.

Maybe something like this that supports 'g' in older versions: