Where I live now, it takes 15-20 minutes to drive to the grocery store, so it's only practical to shop once per week. Shopping is a big chore and a fight with traffic, not a nice walk. It means I need to dedicate more of my apartment to food storage and more of my time to meal planning. It's certainly not an efficiency gain for me personally. On the plus side, the large store does have 73 different flavors of potato chips.