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Only food I trust for 22+ years is probably honey. Maybe dried beans or rice if they are completely dry and there's no oxygen.
I've had rancid Mountain House dehydrated food, presumably from oxygen degrading it. Maybe the packaging was compromised at some point. Not fun choking that junk down when it's the only thing you packed and you've just set up snow camp after snowshoeing to the top of a mountain.
If I were a prepper, I'd probably store honey as a tradeable commodity, along with enough food to get through 1 year. That way if disaster strikes in the summer, you've got enough time to plant food in the spring and harvest the following summer. No real point in holding more than 1 year in reserve.
The proper way to prep is to have an inventory of food that keeps for a couple years, and take a first in first out approach to consuming it, and then replacing what is consumed. You don't want to hope your 25 year old food is ok, you want to cycle through it so that's never an issue.
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