I rotate my storage a lot and used it last year when my husband was laid off. What I found is that I prefer smaller cans because I usually don’t need larger sizes. We have three kids left at home at this point. We still only cook for 5 people, one meal at a time and if you are in a situation where you don’t have refrigeration you may not want to have to store the large can leftovers.
After 9/11, my dad filled a duffel bag with some energy bars, a couple gallons of water, some penicillin, and a map. Amid scaremongering headlines about imminent anthrax and “dirty bomb” attacks in the city, he wanted to have some supplies on hand in case we needed to get out of Brooklyn fast. Were he to assemble such a bag today, he’d likely stumble on a number of companies promising a more wholesale brand of disaster preparedness: a box full of shelf-stable freeze-dried meals, to be revived from their dessicated state with the addition of boiled water.