"A productive knowledge worker is one who enjoys and is enthusiastic about their work, finds meaning and purpose in their work, is not continuously stressed, is appreciated, has a work-life balance, finds the work atmosphere pleasant, and resolves conflicts with co-workers quickly. This suggests that the famous 80-hour workweek developer is not a productive developer."
https://paperpile.com/app/p/c1c4ce29-c0f0-015a-b603-5334864757e1