I see an awful lot of pony cars (albeit, much more V6s than V8s) driving around on a daily basis to buy into the declining sales hype. Perhaps NEW sales have taken a dive, but I would relate that to situations like mine: I scoured the Southeast for a new 1LE and for the life of me could not find one that was 1: on the lot and not "in transit" or 2: priced way over MSRP due to "market value adjustments". I ended up buying a 2018 2SS 1LE with low miles, saved over 15K compared to new, and I'm perfectly fine with the 18.
I believe that dealerships kill the sales far surer than government regulations. Look up the price of a new Scat Pack