I don't have to wait until you're dead because your opinion thankfully doesn't dictate reality.
So, what's the cap on a movie being too old? I mean, Raiders is 31 years old. By some standards, that's an old film. It certainly is "before my time"...But that doesn't stop it from being a good movie. Just because something is "old" doesn't automatically make it "blow" to use the word you used. By refusing to give movies that are "before your time" a chance, you'll be missing out on some of the best films of all time, like Casablanca, Rio Bravo, Sabrina, The Misfits, North by Northwest, It Happened One Night, The Wild One, etc.
When the majority vote on something like a film for 70 years, or for 40 years, I think the majority is on to something. Like the majority agree that Raiders is a classic.