that the average modern user would spend around two hours per day on social media and related messaging services, with close to half that time dedicated to Facebook’s products alone. Similarly, a first adopter who picked up an iPhone in 2007 for the music features would be less enthusiastic if told that within a decade he could expect to compulsively check the device eighty-five times a day—a “feature” we now know Steve Jobs never considered as he prepared his famous keynote.
