I found soap decades old, very likely older than half a century. Hundreds of boxes and hence thousands of soap bars. I'd regularly found them for years and years here and there for my great aunt had stashed those left and right. I found some in system ceilings (!), in the attic, in the basement, in drawers.
My great aunt died years and years ago (RIP) but as recently as a few weeks ago my brother and I cleaned/emptied a garage where she had hidden some stuff.
More soap bars.
I don't need the physics/chemistry: I know that soap is a stable molecule. I suspect some of the soap bars were dating back to WWII.
My great aunt was also in the "waste not / want not" camp. But as she lived through WWII as a teenager, she was in fear of ever missing things again. Hence the soap bars.
This makes me wonder how many people have a garage full of TP just in case COVID-29 plays out like the first one did.
I definitely make a point of keeping a small stock TP (and cheap/easy food, like bologna, hot dogs, and bread) around in these post-covid days.
Not to the extreme of the story about the soap, above, but: Something in my mind was changed a little bit more every time I'd go to the store and there were empty shelves. So now I do things like always have a few weeks of TP, and I freeze things like bread and bologna.
I never did that at any point in my adult life leading up to COVID: If I ran out of something, I just picked up more later at the store the next time I was nearby (or any other time; lots of things were 24/7 back then).