Thank you for posting, interesting article. When we moved into our house 2 years ago there were rows and rows of canned food in the basement. Most of the dates I found on them were the late 70s early 80s. My son took some to his ag ed class and they said that they still tasted good (if I recall correctly it was peaches and green beans). This from my son that wont drink the milk the day before the sell by date. There was also meat that had been canned that had lost all the liquid in the jar, ewww.
I’ve eaten dill pickles from canning jars that were canned AT LEAST ten years before I tried them.
They were totally fine.
I generally try to rotate my stored goods but once in a while you slip up and I opened a can of spagetti sauce that was about 5 years past the expiration.
Except for it looked as though a small amount of the water had somehow evaporated out (it was about a 1/4 inch from the top), it was totally fine and had no off-odor or color or texture ate all. It was spagetti sauce. Of course, it is by nature a high acid food.