The population on this site, or any other, is not stagnant. For many of us who have been frequent contributors for some time, many of these subjects fall into the category of "oh, hell, not that again".
But, keep in mind, new faces appear every day, many have no idea that just last month a thread ran on the very subject that a new poster might want to discuss. In other words, what is fresh and new to then is old and redundent to the veterans of the Board.
This goes on with every Internet Site that features Talk Forums. Go to the Classic Car Sites. Some guy is probably bitching about the 100th thread this year that has been started on "is Ford better than Chevy", or "is the new Hemi really a 'hemi'".
It's the nature of the beast. If you think about it, there are only so many topics to be discussed concerning any endevour, whether it is on a Web Site dedicated to improving you golf swing, or on a Site dedicated to improving your pussy eating skills.
Sooner or later, you end up right where you started. Another thread on "Show us your Assets". (that was for you Sarah).