> In a walkable city you go by a store every time you go outside

I'm all for designing for walkability, but this is a case study in failing to understand audiences. If you make this not just a possibility but a requirement of walkable cities, many people won't want to live in your "walkable" cities at all.

There are much better arguments possible here. For instance, you could promote CSAs for regularly delivered farm-fresh produce, or establish efficient grocery delivery services that use one vehicle to deliver to many many customers, or other potential options that don't involve regular car trips for grocery shopping and don't involve spending an appreciable fraction of your day shopping.

Yes, I could, but I don't want to. Go to store, walk around, wait in line, for what.. 1eur worth of milk? Plus you buy a bunch of other stuff that you don't need, because "it's there". I just make a list, go to the store once, fill up on 100, 150eur of stuff, and I'm done for a week or two. Stores are horrible, people are slow, they 'park' their carts in the middle of the aisle, so you have to bump into them to pass, they're too stupid to use the self-checkout lines but still use them and wait for someone to help them (scan stuff for them, instead of just using a normal line), people wait for 10 minutes in line, without realizing they'll need to pack their stuff and pay, so only after half of their stuff is scanned, they remember to take out their shopping bag, and only after they hear the price, they start searching their handbag for a wallet. Then they remember they need cigaretts too,... Delivery sucks too.. overripe bananas, bumbped apples, half-thawed frozen stuff, crushed boxes, long-lasting food just before the expiration date, etc..

Nope, weekly trip to the store minimizes all of the issues.

And those stores will be significantly more expensive to buy from while having a smaller selection of goods. It's my understanding that small stores also live off of selling less healthy stuff like alcohol, fast food etc. Some villages here lost their only store after an alcohol tax increase because the stores weren't profitable to run anymore.

Isn't modern technology grand? See also pasteurization, canning, pickling, and many many other technologies that help food last longer. Why should people care what something is "supposed to" do? Many kinds of food are "supposed to" spoil quickly, but we've gone to great lengths to overcome that.

(For clarity in case there is a nomenclature difference here, UHT milk is shelf-stable liquid milk that's entirely equivalent to any milk but lasts much longer before expiring. That's separate from things like evaporated milk or powdered milk, which are also substitutes for milk but not directly equivalent.)

UHT pasteurised milk. The one I have at home now has an expiration date in late june.