I am on a non-wine related forum. The folks who run it changed the format awhile ago to make it "better". Now, it is largely dead.
New is not always better. But, the slogan "new and improved" is a time honored expression. It just doesn't always work. There are also times of the year when people tend to be busy with other things, such as summer vacations, winter holidays.
I, too, have met many forumites and without the forums would not have had a chance to do so.
As to content, there have always been threads on entertainment, dining, travel and other things not necessarily wine related. I value the advice I've gotten from others on restaurants abroad and domestic, and travel sites and hotels.
I would guess that there are proprietary data relating to the number of posts per day which would reflect whether the forums are dormant, dying, or otherwise.