On Wed, Dec 13, 2017 at 1:53 AM John Wiegley <johnw@gnu.org> wrote:

> Plus, there are other, less intrusive way to achieve "show the available
> valid
> key bindings", such as the which-key package.
>

As I mentioned in a recent response to Stefan in this thread, I did a poor
job with that problem statement.. I don't want to *just* show the available
bindings.

I think one area where Hydras come into their own is that once you have the
> Hydra active, it stays active, allowing you to chain together many single-
> letter commands.
>

That's correct. It's up to the package author as to how much of hydra
features they want to pack into their package's hydras. hydra is not *just*
for showing available keys and/or *just* for chaining many single letter
commands. It's much more, in a good way.
-- 

Kaushal Modi