I don’t understand why people care about local book stores if not for the atmosphere. Buying online from local stores makes no sense. The store doesn’t make the books. They’re exactly the same thing no matter where you buy them from. “Local” book stores just buy books online and then resell them so what could you possibly gain from not just buying on Amazon?
You gain a higher chance of the bookstore being around when you want to go there for the atmosphere in the future. (and if I don't want a specific book right now, the people at my local bookstore are quite good at recommending things. And some people don't want to support Amazon)