New American houses are being built with a loading dock. A small door from the garage straight into the pantry, so the trunk of your car opens about 4 feet from the shelf the paper towels live on. Builders started offering it around 2022 for roughly $400 as an upgrade. Families named it after the store. That tells you who actually designed the floor plan. Costco's whole model runs on getting the customer to do work a normal retailer pays for. No bags. Pallets sit on bare concrete instead of…