Zuckerberg knows how short-lived products can be, on the internet:
he knows that if he wants to build a company which will last
decades, it’s going to have to outlast Facebook as we currently
conceive it. The trick is to use Facebook’s current awesome
profitability and size to acquire a portfolio of companies; as one
becomes passé, the next will take over. Probably none of them
will ever be as big and dominant as Facebook is today, but
that’s OK: together, they can be huge.
The difference I see: Warren Buffet buys companies with a track record of profitability.