I noticed that several blogs I read on a semi-regular basis seem to be dying, if not dead. They fall into a couple of categories:
1) Have been deleted and their domains taken over by others.
2) Have not been updated in months.
3) Someone is in the process of deleting posts.
Blogging is a marathon, not a sprint. I think that for some people it is just too hard to continue to maintain their blogs.
All I know is that I was sorry to see some of them go.