> When I first started at Microsoft, I had a sleeping bag in my office. I coded until 11pm nightly and slept until 3am, at which point I’d code until ~6am, then sleep until my first meeting ~10am.

It’s everyone’s pejorative on what they want to focus on in life, but this is pretty insane. Obviously it worked out for him (so we think), but this sounds like recipe for a couple divorces and kids that hate you (even if he eventually slowed down somewhat).