Honestly I don't think 40 hour weeks were in any way fine or sustainable for me. Only when I reduced to 35 hours i felt I have productive time next to work. An

Honestly I don't think 40 hour weeks were in any way fine or sustainable for me. Only when I reduced to 35 hours i felt I have productive time next to work. And today I maybe work 4-8 weeks a year at 60 hours and the rest closer to 10 hours a week. I am not sure how other people cope with that, but 40 hour weeks are crazy time consuming in my book.