It's just a function of the increase in topic breadth.
When you get to articles about technical details, I still see the quality comments as before.
It's just that there are more tech-fashion articles and "bitch about the policy of company X" articles and political articles where comments inherently trend much more toward the subjective and thus half the audience is certain that half the posts are 'crap'.
And the audience pulled in by that growth in topic breadth still reads the more-technical articles. So the vaguely political/tribal quips that I'd always noticed strewn about in even the technical threads are no longer politely ignored, but become points of tangential debate.
When you get to articles about technical details, I still see the quality comments as before.
It's just that there are more tech-fashion articles and "bitch about the policy of company X" articles and political articles where comments inherently trend much more toward the subjective and thus half the audience is certain that half the posts are 'crap'.
And the audience pulled in by that growth in topic breadth still reads the more-technical articles. So the vaguely political/tribal quips that I'd always noticed strewn about in even the technical threads are no longer politely ignored, but become points of tangential debate.
It's pretty much inevitable with growth.