Funny, for those of us who are friends with Greg Pease on social media, he really loves those really old latakia blends that he has stashed away for decades, the older the better for him. I guess it just depends on your tastes.
I have had really old VaPers, more than 20 years that have been excellent smokes. And, old aromatics are even worth giving a taste to, maybe not the bulk Lane Ltd, but even the codger blends seem to have something marvelous that happens with age.
I'd be willing to gamble on some older things listed above as not aging well. I think that if you enjoy sampling things, leaving some aromatics, or burleys, and especially some latakia is going to be well worth the gamble. Besides, it's not going to be like 25-35 year old Balkan Sobranie is going to become your all day every day smoke, and even if it could, what would be special about that? But, if the opportunity came up to purchase a 25 year old latakia, I would jump on it. Actually, my pipe club does. Pitching in 20 bucks to get a chance to smoke several bowls of something rare and exotic is worth it to me. What does it take to awesome? And, yes on occasion I have had a few bowls of something that was not very pleasant, but probably started off as unpleasant to begin with. The worst I have had was 20+ year old Country Doctor, that tasted like Mixture 79 to me. But, it was worth it for the experience.