After a thread recently in this group about falloff in traffic for the group this year, I posted a survey to three modeling-related web or email discussion groups I frequent.
By far the biggest situation among those who responded was- they were unaware of what newsgroups were, and how to use them.
Next biggest response, from those aware of rms and had tried it before, was, the amount of off-topic discussions and flame wars turned them off to group. The three discussion groups I posted the survey on were moderated, but loosely.
There were single reasons that were miscellaneous, like not enough time, etc. But those two that were big in responses have some messages for us. I intend to post to these groups explanations of how to set up the newsgroup service in their email client.
For the second reason, I guess I have been as guilty as any in starting or responding to OT stuff, but we have to consider that it is causing us a loss of members.