Loads of people even on this list are sitting on
stacks of old floppies, and don't even take the time
to ensure the data therein won't be consigned to
oblivion.
Lurkers far outnumber active participants on mailing lists. The CHM
Software Preservation Group mailing list has over 100 subscribers. I
doubt if there have been posts from more than a dozen people there.
I think there are four people who have created content for the group
web site
http://www.softwarepreservation.org/