Yes, I think the stereotype, over time, is nearly inconsequential. As those folks will all soon be dead, so do not curse the dead, for we all get our turn on that wheel, whether we want it or not.
Their celebration is a moment in time, it is a simply a quirk of human psychology for group, in time, in the general population behavioral sense. Nothing new under the sun. 20 years from now we might get the Kanye is king crew to be more prominent, if such a grouping exists.
Beatles fans are the last echo of a dying group like WWII veterans a few decades back.
If you try hard enough you too can eventually be an aged echo of a moment in time in fanaticism. Like LP's or class AB solid state amps, or gasoline vehicles, or early Tesla cars, or...or...