On Mon., Dec. 27, 2021, 23:22 Richard Stallman, <rms@gnu.org> wrote:

>  so it's probably doable, but a large
>   > part of its functionality depends on mpv, which is in NonGNU ELPA. Is
> it
>   > okay for ELPA packages to depend on NonGNU ELPA?
> I think we should avoid that -- if "depends" means "needs, in order to
> be useful".  Everything in core Emacs should work and be useful without
> ELPA.  And everything in GNU ELPA should work and be useful without
> NonGNU ELPA.
>

As it turns out, subed-mpv.el doesn't even use mpv.el, as it implements its
own process control for the external MPV video player, so no problem at
all. :) Uh, yes, I did actually accept the maintenance of a package that
I've only read about half of, but that's mainly because I kept submitting
patches for the stuff I wanted to tweak and the original author hasn't
written Emacs Lisp in a while... I will try to not make a mess of things
while I'm squeezing coding/email into my sleep-deprived discretionary time.
:)

The idea of NonGNU ELPA is to be add-ons to the rest.
>

It's probably pretty reasonable to keep subed in NonGNU ELPA instead of GNU
ELPA, anyway.

Sacha