[anthuswilliams]

Even social sites with lock-in can still lose market share because you can socialize on multiple platforms. I still have a yahoo email address cos my grandmother likes to send me email forwards. But when I make new connections, or reconnect with old ones, I don't do it on yahoo.

Grandmothers won't save Facebook. They'll allow Facebook to linger on like a maladapted dinosaur or the old VAX your IT department uses as shelf space. But in a post-Facebook world, just because we all keep Facebook accounts to maintain ossified relationships doesn't mean Zuck still has social relevance.