> one not so obvious thing is that in the wild, the overwhelming majority
> of projects uses mailman2. mailman3 is a complete rewrite with a
> different user interface. It's best to treat them as separate projects
> when evaluating a solution. Regarding alternatives that haven't been
> mentioned yet, Sourcehut does provide (among other things), a mailing
> list service [1]_. It should hopefully be easier to set up than mailman3.

Thanks. I was completely unaware of this. So Mailman 3 is controversial
like Python 3 or Gnome 3.

Debian doesn't package Mailman 2 anymore. Do you have experience setting
it up (or SourceHut for that matter)?

I'm starting to be weary of handling so much grunt work by myself. Don't
take this as an obligation, as you haven't signed up for anything; the
request for assistance applies more generally.