The corollary of that is: Don't overestimate the benefit of physical presence. Sure sometimes you need to buy metal on the spot, but you could say the same thin

The corollary of that is: Don't overestimate the benefit of physical presence. Sure sometimes you need to buy metal on the spot, but you could say the same thing about books and electronics. Amazon's targeting the customer that can forcast his needs a few days in advance, and that's a very big slice of the market.