I worked in restaurants and bars when I was younger, and pulled in 80-100 hours every week for a few years. When I got my first engineering job I did the same thing, trying (successfully) to learn and develop my career as quickly as I could. I’ve also gone through phases of working 60+ hours as a contractor, trying to save as much money as possible.
For me at least, doing that much productive work in a week was never very difficult, but it was only possible because I had no real responsibilities at home. I had friends, but barely spent any time with them, and I once went 5 years without taking a holiday. I wouldn’t do that again today, but for a young person trying to set themselves up in life, it makes perfect sense.
