impact of modern muscle cars on the old car market

I have seen prices of our old Mopars rise and fall a few times since the first crash of '91-2. I see plenty of what I regard as over priced, pie in the sky prices, restored cars down to junk rollers. I see few cars actually selling and fewer for those high restored prices. I see more B bodies sell than or A bodies, and looks for what little I look at E body $, they are not selling much either. That is OK with me, I don't need to sell anything, but always on the lookout for a good project priced for what I think it is worth. I look and I find.
I have to wonder just how much the "modern" muscle car has taken away from people buying our "old" mopar high performance models, or even the more pedestrian models??? I have some friends that for decades bought, did the resto thing, and one day said, enough and bought late model Challengers. Just wondering other people's view of it all.