> I have a hard time understanding how anyone could make the next AWS on just a 9-5

Why? Surely it's doable within the 9-5 schedule (plus some people for the on-call rotations), it would just take a bit longer?

Maybe because you'd have to go the extra mile to outdo competition and gain a majority market share.

It isn't just the 9-5, but the idea that your job stops when you leave the office. If people see it as a transactional relationship only, it means there's less investment in the product

Not sure if you're joking, but "we prefer to spent life with friends and family" implies that they have no interest or desire to build the next AWS.

People may have no desire to build the next aws. That is fine too. He’s not claiming to have a world changing job.