I also remember from my parents that the basement was always full. When coffee was on sale, they would just buy 20 packs, the same with other things that were cheap at the time. When I look at the flyers today, the items are constantly rotating in the ads, so you don’t need those quantities anymore. We don’t do prepping ;) A crate of water in glass bottles would still probably be sensible in case the tap water has to be shut off (which is what we otherwise exclusively drink). I tend to prefer buying larger quantities too, for example 10 packs of flour at once, because we constantly need it, and I don’t feel like lugging it around all the time with small purchases, better to do it properly once. Same with everything else in cans/boxes. The only thing I’ve really stopped storing a lot of is frozen stuff because it just doesn’t taste good after a while. And potatoes – well, a 5kg sack we can’t use up all at once, and they sprout so quickly sometimes, so they have to be kept cool. For the rest it’s almost irrelevant. And if a civil war were to break out, we’d have other problems than not enough supplies in the utility room/basement and those wouldn’t help us without defense installations anyway... Oh, and flour and stuff I wouldn’t store in the utility room either, we’ll also do laundry in there, and despite the exhaust air, that’s probably not a good combination. But there are kitchen cabinets for that.