“I have friends who are feeling like chumps and have begun throwing their aging supplies away.”
Then they’re pretty stupid. We’ve never had a fire yet we’d never throw away our fire extinguishers.
Having emergency supplies on hand is just good common sense. If you manage your supplies right then you’ll just rotate them through your usual supply of staples. Like we keep flour and cooking oil and other essentials on hand and there’s enough for more than three months of certain things and then we probably have a year’s supply of canned goods and pasta and etc.
Our LDS neighbors helped us set up our pantry when we moved to Wyoming and we do our best to follow their good advice.
https://www.lds.org/topics/food-storage?lang=eng
Then you just drop the new cans in the top and the oldest cans dispense out of the bottom, no hassle. I've seen people who were handy at carpentry just build something similar into their pantry shelves.