It already is, at least here in the U.S.:
Most prominently, the United States lost nearly 6 million users, falling from 155.2 million at the start of May to 149.4 million at the end of it. This is the first time the country has lost users in the past year. Canada also fell significantly, by 1.52 million down to 16.6 million, although it has been fluctuating around that number for the past year. Meanwhile, the United Kingdom, Norway and Russia all posted losses of more than 100,000.
Some are here--Isis/Iris (see comment below). There were other issues with the Ning for some of them.
Starting a group sounds like a good idea but I doubt they'll come back. Facebook is there one stop shopping and the Ning is just yesterday for so many of them.
We're all groveeting in our little private groups.
True, this site isn't dead, only all activity nowadays is in private groups. If you aren't a member of those groups, you're almost an outcast, because nothing happens elsewhere, in the public groups or the main board (MB).
I think Just Gus raises a good point, but I also think that the answers so far have skirted around the truth: The MB has become a deserted battlefield. The various "factions" (or "groupings" or "sides" or whatever you want to call them) that used to roam here have withdrawn into their own private groups where they can express their opinion without fear of contradiction. Even the most combative people get tired of fighting, so there's nothing strange about that development.
I don't know if it's even possible to revive the MB without reviving the old gripes and enmities as well. If it isn't, perhaps it is better after all to just let the MB remain a wasteland?
Can we reboot this place? Do we want to?
With the mortal enemies safely ensconced in their corners it's a happy and fun place here. An armistice has been achieved. We do come out and help newbys most of the time. And the Ninjas are dominated by one faction, loyal to Droid, so peace is assured.
Plus we do have a few great standalone public offerings, like Baff's Sci-Fi shows times and channels listing (which he maintains like a wonderful religion).
Guess I've been outed as an outcast! Oh well, it wasn't the first time and it won't be the last.