On Sep 29, 2018, at 6:24 AM, Paul Moore <p.f.moore@gmail.com> wrote:

But at least it was *possible*. Personally I do a Google search rather
than using my MUA, but the point is that while it's clumsy, it's known
technology. I don't even know how I'd find a link to an old message in
Discourse, but I assume it's not searchable via Google? Sure, I can
learn. But how about a member of the general public (after all,
python-committers is supposed to be restricted for posting, but
publicly visible)?

Discourse is perfectly searchable using Google in exactly the same way as Mailman archives. It also has built in search.