I can't place my finger on exactly when, but it has. Diaries don't have the impact that they once did and are posted with the purpose of gaining mojo. It's like high school for nerds.
Kos asks for gender id and we find out that we could be mistaken for the GOP high command or the Catholic magisterium. And the quality of the diaries and comments, don't get me started.
Most importantly, like FreeRepublic, commenters on this site use various methods to stifle debate and honest disagreement. This was not true a few months ago. Now, I see a lot of mojo'ed commenters zeroing out arguments with which they merely disagree rather than ones where the point should be legitimately suppressed.
Daily Kos was a good ride. Thanks. I think I'll go back to lurking.