Thanks for putting together the report, Tully.
One additional metric that has gone up over the past four years is the percentage of questions on
answers.ros.org that have gone unanswered. I've attached a graph with the numbers from the past reports. We've steadily grown from 13% in 2011 to 32% now.
I'd be interested in seeing additional numbers on what kinds of questions get answered or not. Do power users get more of their questions answered? Are certain tags more answered? (I swear I'll get to your navigation questions soon).
There's the bigger question of what we as a community can do to get more questions marked as resolved. The answer is most likely somewhere between answering more questions and making sure questions are marked as resolved (if they are). Maybe September 19th is "Answer ROS Questions Like A Pirate Day".
-David
P.P.S. I realize the irony of complaining about questions not being answered by asking additional questions.