The big point seems to be "Many web applications, including Scout, have customers around the world. There isn’t a perfect time for a deployment." It is like a

The big point seems to be "Many web applications, including Scout, have customers around the world. There isn’t a perfect time for a deployment." It is like a road stuck in a permanent rush hour -- if the time of repair has little effect on the users annoyance, then it's a good idea to pick the time to maximize your performance. Working at night isn't hard in the meaning "I don't know if I can pull that off," but in the "I don't know how well will I pull that off" meaning. Anyone can pull an all-nighter or two, but most people will make more errors in the night than during the day.