Sorry for the provocative message title. The contents of the group, and the people who are exchanging information, are fine.
Yahoo Groups aren't very good. Information is organized poorly, and Search doesn't work. I searched for a message I sent last week and it wasn't found. Searching for my name turns up some messages I sent several months ago but no recent ones. Google Groups work much better than Yahoo Groups. Information is easier to find, and search works. I wish this group were hosted on Google instead of Yahoo.