Current dealer inventories might provide some insight, and it doesn't necessarily look encouraging for those who want their performance cars turned up to eleven and track ready from the factory.
Years ago we recall feeling downright spiteful when we learned that the E92 BMW M3 GTS wouldn't hit US shores. The E90 M3 CRT that followed seemed particularly cruel and added insult to injury... No shortage of fellow BMW enthusiasts were likewise disappointed.
BMW M presumably expected the M4 GTS to be well-received by their largest buying audience. A mega MSRP was set ($134,200), invitations were sent to M loyalists deemed qualified.
A current check of Cars.com shows 88 of the 300 US-bound M4 GTS sitting on showroom floors, and 30 more on Autotrader.com. Some listings are duplicates no doubt (please, we're far too lazy to investigate…), but figure as near as makes no difference 1/3 of the total M4 GTS sent to the U.S. remain unsold.
One slightly used example with just 720 miles is listed for a full $10k less than the $134k MSRP. Ouch.
A couple of other new examples are slowly but surely slipping below MSRP.
It's true that the M4 GTS hasn't been universally praised from a driver's standpoint, and it hasn't put down the anticipated performance numbers and lap times either. Important metrics in this vehicle category.
But the Corvette Grand Sport has. It met and surpassed every performance expectation, which is why we find it rather surprising that there are over 3,000 unclaimed and currently on the market.
Certainly we can also point to no shortage of production track car successes. Good luck getting a 991.2 911 GT3 allocation (in either transmission). Every Cayman GT4 sat in the dealership only long enough for the owner to come scoop it up. And there's apparently no Mustang GT350 sales stagnation either. (Although Ford is getting sued by a group of GT350 owners due to overheating issues, which probably won't make them particularly excited about similar cars in the future.)
But nevertheless, from both current and historical perspectives the production track car business is clearly hit and miss with a notoriously demanding, if not fickle buying audience.
One has to wonder about the viability and availability of production track cars into the future.