I think many have said that's already happened! :-) I'm not so pessimistic, but I've been a long term user of Slashdot, MetaFilter, Reddit, and HN, and you do tend to see these cycles occurring and it's interesting to see the differing ways they deal with them.
>I'm not so pessimistic, but I've been a long term user of Slashdot, MetaFilter, Reddit, and HN, and you do tend to see these cycles occurring and it's interesting to see the differing ways they deal with them.