David M at Thunder Run wants to know.I think he hits at most of it. Some of it is fashion - blogging is old hat now, and has been impacted both by ubiquity (gone are our days of 10K+ visits) which lead to niche choices - just like the proliferation of cable channels reduced the no-other-choice artificial numbers of the big tv nets. Social media has changed dramatically, with Facebook and Twitter being much easier to use (and tailor who recieves the data) than maintaining a blog.Plus, DoD has learned...