People who multitask all the time can’t filter out irrelevancy. They can’t manage a working memory. They’re chronically distracted. They initiate much larger parts of their brain that are irrelevant to the task at hand… they’re pretty much mental wrecks.

the bouncer is besieged in an unprecedented way. In addition to switching tasks like never before, our brains are also being forced to filter more frantically than at any point in our past.

This state of fragmented attention cannot accommodate deep work, which requires long periods of uninterrupted thinking. At the same time, however, modern knowledge workers are not loafing. In fact, they report that they are as busy as ever. What explains the discrepancy?