“Why are DL comments dwindling to a four-way circle jerk among the same four contributors?”
…especially when we have more lurkers than ever?
I’ll take a crack at it:
It is summer?
Campaigns haven’t really started yet?
People are tired of commenting?
Commenting like “planking” had its day in the sun?
It is a rare commenter who asks anything that approaches an honest question?
It is even rarer that a comment thread generates as much light as it generates heat?
We’ve turned away the most egregious trolls who could always get counted to start an argument?