João Távora <joaotavora@gmail.com> writes:

> On Fri, May 8, 2020 at 7:54 PM Eli Zaretskii <eliz@gnu.org> wrote:
>>
>> After thinking about that for a while, I came to the sad conclusion
>> that I no longer understand what is the relation between GNU ELPA and
>> the Emacs project.
>
> GNU ELPA distributes some Emacs source files as :core-type
> package.el packages.  This means that we can fix bugs and evolve
> features in those files in Emacs master and not having to wait many
> months until they make into the next core release.  This has proven
> invaluable for the development of Eglot, a GNU ELPA package, which
> depends on jsonrpc.el and flymake.el, which are in the core.  Bugs
> can often be fixed in those files and they'll be available to users the
> next day.  I don't know if this counts as a meaningful relationship,
> but it is  extremely useful nonetheless and we should expand it (in
> fact I discussed it with Dmitry and Stefan I'm going to do it soon for
> eldoc.el, xref.el and project.el).
>
> João

+1.  And I'm hoping to have ERC added to the above list very soon.