My personal interpretation of the current guidelines is that the Mossetti would be legal in NASCAR and GTP as long as it's available through Crawley, Eagle, and/or ERI distributors. Just like the existing (I guess it's still in production?) Mossetti Titan is legal. I think I read that the original timeline was to have it available to distributors in October. Lots of challenges in bringing new parts to market.
The GT1/LMP class has remained a spec class after JK's original three (?) year sponsorship ended because racers support the class so well. Some - maybe a lot - of racers seem to enjoy seeing how they fare when everyone is running virtually identical equipment. There are other classes for creativity.
"Commercial Availability" is a whole 'nother can of worms.
The new Mossetti looks like an intriguing design --- but not overly revolutionary. Certainly not the jump in chassis evolution that the Cheetah 11 represented over the Champion Turbo Flex or Cheetah 7 (which I still think could be tweaked to be an awesome chassis.) Hopefully the new Mossetti will take a hit.
A few years back it looked like there was going to be a tweaked version of the Kelly/Pro Slot chassis that testing showed to be very promising. Sadly, it never got to market.
And The Rigsby hit the nail on the head ..... flexi-based slot car racing would be virtually dead without JK's contributions over the past 8 or 9 years. Very few racers had ever considered using an FK-style motor before Jerry pushed the Falcon motor to the masses. And the Cheetah 11 chassis made good drivers more competitive because it handles so much better than the old Champion Turbo Flex. Made for much better racing.
Hopefully when the day comes that Jerry retires or sells (we all hang it up eventually), the company will pass into the hands of someone who has an equal passion for the hobby.
I can tell you this .... if JK just went away ..... it would leave a helluva void in the hobby.