This is something I've been thinking about lately, particularly this item:
3. Norms and practices. Bloggers have undermined the blogosphere. Bloggers do not link to each other as much as they used to. It's a lot of work to look for good posts elsewhere, and most bloggers have become burnt out. Drezner and Farrell had a theory that even small potato bloggers would have their day in the sun, if they wrote something so great that it garnered the attention of the big guys. But the big guys are too burnt out to find the hidden gems. So, good stuff is being written all the time, and it isn't bubbling to the top.
I appreciate all the points and I can't say any of this surprises me but the blogosphere has changed and become a less vibrant and less interesting place.
[Via Kevin Drum.]
Adding, I also think that opposition to Republicans in general and the BushCheney regime in particular was an energizing force but now with Democrats controlling Congress and the White House it's becoming obvious that said Democrats are little better than those they replaced. This has a dispiriting effect.