RE: Bikeshedding go! Why is <M-f4> unbound?

[Drew Adams]

> > What is the reason for Emacs to bind Alt-f4 (or M-f4) to 
> > behavior that agrees with what Alt-f4 does outside Emacs?
> 
> It is otherwise unbound.

That's the reason?  It doesn't have a default binding so it needs one?  And that
default binding should be `Alt-4'?

> > If the latter (b) is the only reason, then I don't see that 
> > as a good reason to force the same restriction on Emacs
> 
> In what way is an extra default keybinding a restriction?

So let's bind _all_ unbound keys by default, then.
Hey, that's no restriction.  What's the harm?