" Consider that the telephone took 75 years to reach 50 million users, whereas television was in 50 million households within 13 years, the internet in 4,  . . . and Angry Birds in 35 days. In the tech era, the pace is accelerating further: it took Microsoft Office 22 years to reach a billion users, but Gmail only 12, and Facebook 9. Trying "

― Scott Galloway , The Four: The Hidden DNA of Amazon, Apple, Facebook, and Google