As I say even if Kaz wanted them on PS5 I highly doubt they're even compatible with their current ray traced lighting engine. The premium models weren't, and they were supposed to be future proof. If it turns out those actually weren't without timely reworking that meant none appeared in GTS at launch, the low poly single piece standards definitely won't be. Doubly so for the further improvements in PS5 tech. Even if it was treated as a spin off, why wouldn't they include any premium car models in the game at launch if they could? Why did they only come later as updates, clearly modified and upgraded?