My question is this: like the fashions that come and go and come again, will Tribes as a concept (and a reality) become popular only then to see the pendulum swing back the other way in another generation or so? Or will there be even more splintering as Social Media Channels and Networks come into being awash with variety that feels like you just got DirectTV and have too many channels to watch, let alone keep track of.

I'm Tribal like you and I hope being so never goes out of style, personally...