What happens to Black Friday crowds in a pandemic?

Even before the coronavirus pandemic changed everything about, well, everything, Black Friday was already on its last legs. The post-Thanksgiving shopping holiday kept creeping up earlier and earlier. Retailers started opening their stores before dawn on Friday, then at midnight, encouraging shoppers to wait in line for doorbusters before they had even finished digesting their turkey and mashed potatoes. Eventually they threw caution to the wind and started opening on Thursday afternoons, well before most people had gotten a chance to eat dinner at all.

This year, thanks to the...