I didn't even know there was
an expiration date on soy sauce
I don't use it often, maybe a few times a year, but I'll betcha my bottle is at least 10 years old
I don't know if it makes a difference that I only use it as an ingredient when cooking food, not as a condiment on top of already cooked food.
One item I have thrown out though is tobasco sauce, when it changes colors from reddish to brownish.
OK, I just looked. Apparently I got my bottle of soy sauce before they started putting expiration dates on them. I'll bet it's more than likely 20 years old.... or older