Some people moonlight other gigs (overemployed) and put unusually high levels of pressure to perform in themselves. So, 2/3x-ing that normal output is unsustainable but profitable. Context switching does take a toll when you’re putting out fires that have meetings attached. This was just an anecdotal example of a person who is running themselves into the ground. Startup culture of the 2010s fostered a lot of the myths of ultra-productivity and wealth without the backstory of drug abuse.