I too left Yahoo for IO Groups, I got in under the lifetime free wire. Depending on the size of the membership in the group, it can become very expensive to use now. We have 30 odd lists and 3000 members in our DMR groups, most of our DMR networks runs under 44net. It does mailing lists with or without all the web GUI front end features. No looking back after leaving Yahoo. We operate several dmr-l lists, somewhat like the old Usenet Newsgroups.
I also agree that discord is not the best approach.
73,
Mike, NO7RF