This. I have ~5000 rep, but have pretty much gone to not using at all for the past year, primarily due to shoving questions to ancillary SE sites. I dabble in administration, but not enough to constantly view ServerFault. I'm interested in algorithms, but I'm not going to spend all day only on that. The old StackOverflow seemed to be perfect for renaissance techies; there was a little bit of everything all in one place. I'd answer a question on C#, then ruby, then design patterns, then server admin. Now it's fragmented, I guess taking the "silo approach" to Q&A. It really kills it for those of us who have a variety of interests. That's not even getting into the "too few eyeballs" problem.