I loved the Whats App founder talk at the YC online class (I don't have the link either). I paraphrase: "we decided to make a messaging app just when that was t

I loved the Whats App founder talk at the YC online class (I don't have the link either). I paraphrase: "we decided to make a messaging app just when that was the best, most profitable thing we could possibly have done." There was a ton of experience and talent behind it, but they acknowledge that they got lucky and timed it perfectly.