These don't need to be night shifts. Back when I worked in bigco, we had very competent ops teams around the world - we'd even send developers abroad for 3-12 m

These don't need to be night shifts. Back when I worked in bigco, we had very competent ops teams around the world - we'd even send developers abroad for 3-12 month periods to train with them and share information. Smaller companies use Heroku so we don't have to build the same expertise in house. They're able to charge a premium not because their developers have to work crazy hours, but because there's a certain base cost to having these kinds of distributed teams.