Sure, but this wasn't that. This was an item that was on sale that had one left that they showed me just before I checked out. If I had just picked it out, tha

Sure, but this wasn't that. This was an item that was on sale that had one left that they showed me just before I checked out. If I had just picked it out, that is one thing, but to bring attention to it is just a bad experience. They could simply start by removing anything with a single item left from the last minute sales pitch. They could improve it by figuring out the probability of an item being available. Honestly, it's bad UX that they even make you choose a store, that is an implementation detail. I have 3 Walmarts within 5 miles of my house, and 10 of them within 10 miles. They should present them to me as a single same-day warehouse, and then they can work out where to get which items from.