Re: Current mode command discovery

[Alfred M. Szmidt]

   ... then you should agree that M-S-x works out of the box in any
   terminal: "C-x @ m S-x".

And nothing what I wrote claimed anything else -- yes you can input
the M-S-x key sequence in other ways.  But getting M-S-x to work in
some situations can be extra tricky compared to say faking hyper/super
using another key that can be sent or using C-x @ -- the shift key
often needs extra care, that is all.

It is also why it is often the case to avoid using shift (other than
being slightly confusing to the user when using caps-lock) when
combining it with other buckies, because of encountered trickyness in
some terminals or even just where the keyboard cannot do too many
modifiers at the same time or has other issues with ghosting.