bug#62720: 29.0.60; Not easy at all to upgrade :core packages like Eglot

[Eli Zaretskii]

> From: João Távora <joaotavora@gmail.com>
> Date: Thu, 20 Apr 2023 15:25:00 +0100
> Cc: Eli Zaretskii <eliz@gnu.org>, jporterbugs@gmail.com, 
> 62720@debbugs.gnu.org, 
>       philipk@posteo.net, monnier@iro.umontreal.ca, larsi@gnus.org
> 
> Whoops, sorry, made a thinko.  package-update _doesn't_ really
> obviate the need for eglot-update, because it won't be callable
> in Emacs 26/27/28, and eglot-update will.
> 
> ...unless package.el itself becomes a :core package and
> self-updates through ELPA, which I think is being proposed
> around here somewhere.  Could happen in master (and leave
> Emacs's 29 version untouched).
> 
> So for the moment eglot-update is my best out.

Of course, introducing and advertising eglot-update will mean users of
Emacs 29+ will need to use a different command to upgrade Eglot than
users of previous Emacs versions -- the same problem that you consider
so awful in the change we made in package-update, where these users
will now have to specify a prefix argument (and do it just once,
AFAIU).  That is, of course, a very consistent logic on your part.