The functional difference between a mailing list and a newsgroup is
privacy. I would prefer that archives were only available to the members of
the list, but the last archive was open and several search engines now have
our text in their databases, so its closing the barn door after the horse
is gone.
OTOH 99% of what we say is done in a "public" context.
Given the recent floppy thread what we need are summaries, not archives.