I guess it all depends what you are looking at. Some topics are hot, some warm and some can be stone cold dead for quite a while. It's just the natural way of things I suppose.
For example, watch the Schumacher CAT threads, now the thing has actually been released I expect it'll explode. Same for the Yokomo B-Max one in a month or so.
The Durga thread has done really well but it
is over a year old now. I still love mine though