I started reading tabletop gaming and OSR blogs in late 2009. The first blogs I started reading regularly were B/X Blackrazor, Grognardia, Jeff's Gameblog, and Playing D&D with Porn Stars. If you're reading the Digital Orc, the odds are you're familiar with most, if not all of the blogs I just mentioned. It seemed to me that with the announcement of D&D Next and the release of Google+ many OSR bloggers either stopped blogging or switched to a different format.
As 2012 drew to a close I had a strong feeling that OSR blogging was in decline. Most bloggers are inconsistent in publishing posts, but I wondered if there wasn't a numerical correlation to what I was feeling. Turns out, there is a big one. If I choose the four OSR blogs listed above as my canaries in this OSR coal mine, I'd say the birds are dead and many of us are next.
The graph below shows the number of posts from those same four blogs over the past four years. If you include relative data from 2013, the trend is at an ever greater slope: Nearly 50 days into 2013 Grognardia and Jeff's Gameblog haven't published a single post.
I know that many OSR blogs such as Tenkar's Tavern and Greyhawk Grognard continue blogging. I know that there are specific reasons for the posting decline in many of the blogs above including family health crisis, birth of a child, and working on a new LotFP adventure. I know that quantifying the OSR by number of blog posts is tenuous. I'm not saying the OSR as a faction of role-players is either dead or triumphant. I am saying that many of the OSR figureheads have fallen silent or switched to a different vehicle for getting their content to the world.