i don't know how old you are, but isn't this just an age thing?
You say that you would know celebs pre-1970's. (beatles, etc?)
so at one stage in your life, you did know current celebs.
its just that you are older now, and the current crop of celebs appeal to the current younger generation (12-25). and when they get old, they won't know any of the current celebs at that time, but they'll remember the celebs of their youth.
Yes, of course. I now understand why my parents had absolutely no idea what I was on about when I talked about bands I loved in the late 60s. Of course, now I can 'work backwards' and enjoy much of the music (e.g. jazz) that they liked, just like my 20-something daughters are very much into Dylan, Neil Young, etc.
Having said that, I probably am more cut off from current pop culture than some others of my age (Mrs. M for example). But I think that may because I AM so obsessive about the (older) stuff that I love - I just can't spare the time or attention on anything else. Whereas what you might call the 'casual listener' will happily take in whatever's around at the time, but only in a superficial, 'wallpaper-ish' way.
That's my theory and I'm sticking to it!
I've used a similar theory in work. We have interweb access to the building regs plus hard copies in the office. I appear to be the only person not to be able to quote the new changes to L2. I have explained to them that I know exactly where to look for fire regs, or stair sizing or whatever so I haven't learnt it in case something important gets replaced.
When asked what important thing might be lost I responded:
Buzzcocks, Pete Shelley, Ever Fallen In Love?
I think they understood.
MJM, you say no rap, would that include the likes of Scot Gil Heron?
just curious