Earlier quoted context omitted.
> Costco is generally clean That makes it sound like cleanliness is not the norm in grocery stores in US.
Thanks to our old friend Baumol [1], cleanliness is not the norm in any typical grocery store in the 1st world. [1] https://en.wikipedia.org/wiki/Baumol's_cost_disease
By the way, where I'm from (EU), cleanliness is definitely the norm for grocery stores.