so, how many cash reserves does microsoft have? doesn't he think that microsoft will just buy some more stuff which will be famous in 3 years or 5 years so that they make money with this then? it's not as if people will really switch to services where nobody makes money with...
people don't always switch every few months even if there would be something better. yes it happened with myspace but common, myspace was nothing against what facebook is nowadays. maybe myspace was big in usa but it wasn't a worldwide phenomenon. people won't just all leave facebook and if they will leave to another service facebook will just buy that service early enough (or microsoft or google)