I had a similarly aged box of Kraft dinner / Mac’n’cheese I posted here.I eventually opened it - the cheese packet smell was startlingly bad, very glad I not only didn’t eat it but didn’t give it to someone else to eat.

I did however send the box for free to this guy, as he evidently collects them…!

Who knows, maybe there is a similar chef-boy-ar-dee can connoisseur!