> I want to pose a question: Is it possible that online users just have nonstop shiny object syndrome, and even if forums worked correctly and did the job, users would still move onto something else because we’re never happy? I think the argument is pretty strongly yes.

This is definitely part of it, but the other side of it is the network effect that allows a minority of the population who happen to be especially afflicted by shiny object syndrome, to drive population scale moves from one platform to another. I feel a good analogue is the way that new restaurants become the hot place, the place to see and be seen, but they can usually only sustain this for a time and then the buzz moves elsewhere. The difference, of course, is that the scale is much much larger, and restaurants generally don’t have a way of attempting to directly addict their users.