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

[Eli Zaretskii]

> From: João Távora <joaotavora@gmail.com>
> Date: Fri, 14 Apr 2023 19:44:35 +0100
> Cc: dmitry@gutov.dev, rpluim@gmail.com, philipk@posteo.net, 
>       62720@debbugs.gnu.org, larsi@gnus.org, monnier@iro.umontreal.ca
> 
> On Fri, Apr 14, 2023 at 6:53 PM Eli Zaretskii <eliz@gnu.org> wrote:
> >
> > Is there any reason Eglot that will come with Emacs 29.1 will not be
> > the latest Eglot?
> 
> Yes, it's not the latest Eglot already.  Eglot has been getting features
> complex features and bugfixes in master that I haven't backported.

Why not?

More generally, why does it make sense not to have in Emacs the latest
stable version of every core package at the time of the release?