On Tue, Mar 11, 2025 at 10:05 PM Stefan Monnier <monnier@iro.umontreal.ca>
wrote:

> >> Second package released a couple of days that refers to future features.
> >>
> >> track-changes says:
> >>
> >> ;; Package-Requires: ((emacs "24"))
>
> "Package-Requires:" does not intend to mean that the package is
> guaranteed to work with that release.  Instead it's intended to mean
> something more like "it's guaranteed not to work with an older release".
>
> >> Is there an ELPA infrastructure testing regime,
>
> AFAIC, the burden of testing on older releases falls on users of those
> older releases.
>

I'm on 30.1 these days.  Not so old.