[vmorgulis]

Yes but he doesn't code. He is more a manager and a good one.

Programming requires a lot of concentration that is hard to sustain for a long time (the author of the post is an iOS programmer).

[tim333]

He used to code and wrote his first product zip2 over the summer in 95. Not sure about the hours - I guess you can do long hours for a couple of months https://www.youtube.com/watch?v=7sLmeYNmZKY

(In the vid he's saying he used to sleep on a futon in the office as he couldn't afford a flat at the time)