I'm in a few google groups that only get used for discussion style emails, where nobody actually uses the web interface. I'm also on a bunch of email lists usin

I'm in a few google groups that only get used for discussion style emails, where nobody actually uses the web interface. I'm also on a bunch of email lists using mailman and run through the computing society of my alma mater (as well as some similar lists from other nearby schools.) Is there some feature set you want that you can't get by setting up a google group and then just using it as a discussion list in old-fashioned email?