It also wasn't so incredibly nasty, though. There were disruptions and some arrests, but the large majority of people were in the streets socializing, dancing, doing impromptu things they wouldn't be doing on a work day.
Cooking, refrigeration and water pumping depends on electric power. It can definitely get nasty if it lasts for more than a day
Only because it didn't last overnight and wasn't at the peak of summer.
Otherwise you're throwing out all fresh food, supermarkets couldn't process payments nor most restaurants either, etc.
Did you check with hospitals, prisons and daycares how things went?
That's because they kinda expected everything to be back to normal in a few hours. If there would be some more catastrophic distributed outage there would probably be less dancing.