Those anecdotes were made more concrete in a report published earlier this month in the Harvard Business Review, in which two researchers from the University of California Berkeley set out their findings from a study of how AI was changing work habits at a US tech company. They saw an increase in both the number of hours worked (extending into early mornings and evenings) and the intensity of that work, as well as a broadening of the range of tasks people took on. Most notably, the company neither asked for these changes or even mandated the use of AI tools at all — the behavioural shifts happened organically.