[sanswork]

Slashdot lost its userbase because new sites like Digg offered more frequent stories/variety and a better experience than the curated and infrequently updating /.

I was never a user at Kuro5hin and only checked it infrequently but I thought it was more due to lack of management than over management that led to the initial decline.

Digg changed the way the site worked.

I've been here a fairly long time and it seems busier than ever to me. I think a lot of the shitty pointlessly mean comments are gone now which just improved s2n even if it means less comments in total.