1. They own ALL of Friendster's patents. they are all encompassing regarding social networking. No way any little guy can defend themselves.
2. someone said another obvious thing: ppl use different aspects of FB and not all.
3. after mons/yrs of teaching your grandma to use FB, no way anyone will move away and reteach.
4. FB offers no complete like Goog's Take Out scenario to easily reimport into another social network.
5. too many catfish. I suspect only 25% are real people. rest are entities, multi-accts.
6. too many simple thinking ppl are entrenched and won't change. comfort zone barrier too high to break.
7. governments worldwide now use them to control their people where in some coountries, every individual getting a cellphone must have a FB acct.
8. some countries like India use FB as their "internet." They don't know www exists.
9. FB can only be brought down by itself and they are already doing a fine job of it. There is a cycle for companies like this and although they now have a very long tail, there is an end to that tail. Next generation will have to make that change over so at a minimum, it will take a generation to make that fall.
10. FB are already losing the next gen, so opportunities abound except for the patent fights that will happen.
Bottomline is FB a road most will need to travel on for now, but I suspect like hwys, toll roads can lead a path out for some while the rifrafts will stay on the sinking boat.