Can't agree more (focusing on microsec vs nights/weekends). It's not an excuse to say they need to train/test their algos, they have entirely separate machines for that. For any other tech company live rollouts are a fact of life. I'd suspect the reason is historical and based on a single person's practical workday, if you extend it to 24/7 then naturally you'd have to have several shifts. Same reason why they are closed on holidays, to give people a break. So I'd suspect it's to benefit the people involved and not the machines which I'm certain can be adapted.