As a 2018 article from the MIT Sloan Management Review explains: “The ‘keep everybody busy’ theory remains alive and well . . . in knowledge work.”39… - Cal Newport

In knowledge work, when you agree to a new commitment, be it a minor task or a large project, it brings with it a certain amount of ongoing administrative overhead: back-and-forth email threads needed to gather information, for example, or meetings scheduled to synchronize with your collaborators. This overhead tax activates as soon as you take on a new responsibility. As your to-do list grows, so does the total amount of overhead tax you’re paying. Because the number of hours in the day is fixed, these administrative chores will take more and more time away from your core work, slowing down the rate at which these objectives are accomplished. At moderate workloads, this effect might be frustrating: a general sense that completing your work is taking longer than it should. As your workload increases, however, the overhead tax you’re paying will eventually pass a tipping point, beyond which logistical efforts will devour so much of your schedule that you cannot complete old tasks fast enough to keep up with the new. This feedback loop can quickly spiral out of control, pushing your workload higher and higher until you find yourself losing your entire day to overhead activities: meeting after meeting conducted against a background hum of unceasing email and chat. Eventually the only solution becomes to push actual work into ad hoc sessions added after hours — in the evenings and early mornings, or over the weekend — in a desperate attempt to avoid a full collapse of all useful output. You’re as busy as you’ve ever been, and yet hardly get anything done.

While the ability to rapidly communicate using digital messages is useful, the frequent disruptions created by this behavior also make it hard to focus, which has a bigger impact on our ability to produce valuable output than we may have realized.

The reason knowledge workers are losing their familiarity with deep work is well established: network tools. This is a broad category that captures communication services like e-mail and SMS, social media networks like Twitter and Facebook, and the shiny tangle of infotainment sites like BuzzFeed and Reddit. In aggregate, the rise of these tools, combined with ubiquitous access to them through smartphones and networked office computers, has fragmented most knowledge workers’ attention into slivers.