[NoGravitas]

The reasonable definition of "working" is "reduces rate of transmission relative to comparable areas with no mask mandate, by an amount that is statistically significant", and it certainly meets that definition. When people argue that mask mandates "don't work", what they really should be saying is that the effect size is too small to justify the inconvenience. At least that's an actual argument, though I think the people who make it are whiny babies.