For many, however, it's not just self-control issues that bias them toward the rhythmic philosophy, but also the reality that some jobs don't allow you to disappear for days at a time when the need to go deep arises. (For a lot of bosses, the standard is that you're free to focus as hard as you want... so long as the boss's e-mails are still answered promptly.) This is likely the biggest reason why the rhythmic philosophy is one of the most common among deep workers in standard office jobs.