It’s not just theory…you really do need to rotate stuff from food storage. Today’s example: salsa from two years ago. It keeps just fine in the classic ‘cool, dark place’..like my basement…but I figured it was time to update. So…a quick trip to CostCo. As you may notice, there are some markings on the lids. The ‘C’ in a circle indicates it was purchased at CostCo, the price is marked on it, and the date.
I keep quite a bit of this sort of product on hand. Cook up some chicken (or open a can of chicken), shread it up, cook it in a bunch of salsa, mix in a large amount of cooked rice, cover with Mexican cheese blend, and eat with corn chips. Cheap, filling, and pretty yummy.
But, the takeaway here is that you need to rotate through your stuff otherwise when you finally need it you might not like what you find. Also, ‘best buy’ dates are wildly conservative.