Let's not exaggerate, it is currently a C. Probably 4-5 years ago it was an A. One reason for the slow degradation is that the internet tends to specialize. Just like any group of people with more than 3 enthusiasts having a magazine, they are also having a messageboard. Sciforums is still a hodge-podge of all topics and trying to cover everything. That might not work in the future, because people with particular interest can go to specialized boards, be them biking, wrestling, politics, whatever...They can find their more similar minded people with the same interest.