[Atropos]

I agree. Things like having the weekends free and getting enough sleep are really important for having a sustainable working life. But that does not mean working 35 hours per week is a must or 40 hours is a natural limit, for example 9 AM to 8 PM from Monday-Friday is a 50 hour workweek and easily sustainable. The norm in industries like banking, big law firms or management consulting is more like a 60-70 hour work week and while it is obviously not desirable, there are many people who can do it for many years.