RE: delete-selection-mode as default

[Drew Adams]

> It's notable that of the CUA-style bindings, one can rebind C-z to
> `undo' in Emacs without the same degree of conflict that the other CUA
> keys introduce; so you might consider:
> 
> (global-set-key (kbd "C-z") #'undo)
> 
> C-z is `suspend-frame' by default (which makes complete sense when
> Emacs is running in a terminal, so changing this default isn't an
> option IMO), but it's a convenient key to *intentionally* re-purpose
> if you know how to `suspend-frame' without it (n.b. C-x C-z is also
> provided by default).  Because it's such a fundamental behaviour,
> AFAIK no other default keymaps touch this key sequence.
> 
> Or you could pick any other convenient `undo' binding, of course
> (but even then you might still change C-z.  I use C-z as a prefix
> key, with C-z C-z as `suspend-frame', which I find provides me with
> a very useful additional prefix for custom bindings.)

One of the reasons I'm not a fan of `cua-mode' for Emacs is that
it wastes good prefix keys (C-x, C-c ). (Yes, I know that `cua-mode'
can accommodate to some extent this by way of timing, but that's
not good UI, IMO.)

I think C-z is wasted on a single action not only in `cua-mode' but
also in vanilla Emacs. It makes sense to use it as either a prefix key
or at least as a key that can be used for actions that are repeatable
(by holding down the key).

That said, for my own use I haven't bothered to use C-z as a
prefix key or for a repeatable command. I use it to thumbify
and dethumbify a frame (like iconify deiconify). But for
Emacs I think it should be used as stated above, not wasted
on `suspend-frame'.