Just to be clear: you are agreeing with your parent poster. Here's your response: Facebook's value IS lock-in, and companies with real technical prowess will fail because they rely on producing something new.
How can a website lock you in to only being able to share things with your friends through their website? Do they lock you out of your friendships if you quit the site? This is a very bizarre notion to me. Facebook accounts have no value, the people behind the accounts and the relationships have the value. Facebook disappearing wouldn't prevent you from communicating with them. Is this real life?
> and companies with real technical prowess will fail because they rely on producing something new
Err, what? Do you mean that smart people working on hard problems are destined to fail? That facebook has some how consumed all of the available users and prevented them from existing any where else on the internet?