Bezos is a really smart guy but here, I beg to differ. I interviewed for a management role over at Amazon. I asked them what they thought of work life balance and how many hours are we talking about a week. 60 or so was the minimum, and that doesn't include lunches. 12+ hour days didn't seem like something you can sustain no matter how much energy you have.

Sooner or later, you will get physically and mentally exhausted at work, even though you have lots of fun doing so before you get wiped out.

I also informed them that if your engineers are working 70+ hours a week basically every week, then you don't have an engineering problem but a management problem. It's no longer a work-life balance, but purely a work-work balance, and that it was up to management to ensure that they don't burn their engineers out.

I didn't get to the next round (thankfully). I didn't "fit their culture". So I thanked them and moved on. Better for them, better for me.

I personally want people who are effective, and can put in a solid day of work. I still pull wisdom from, "Debugging the Development Process" back from 1994. I think it still holds true today for many aspects of software engineering. Or am I really an outdated curmudgeon?