impact of modern muscle cars on the old car market

nah, they would be dead weight, you wont be able to get gasoline in 30-40 years

I can see it now - just like Mad Max 2 thru 27 - no gasoline, and a gang of Mopar zombies are scavanging junkyards for Prius batteries, stealing solar panels from homes, and electric motors from Grainger - all to make a 80 year old Dart GTS driveable once more.