I don't see how it does have anything to do with the next generation consoles. Right now there is the potential that this game will come out, for PS4 the day before the PS5 is released.
Then, potentially another year until a PS5 version appears.
The PS5 will throttle - it has to emulate a PS4, so you'll be getting a PS4 experience of the game either on your PS4 or your PS5. That wouldn't have changed if the game was released last now, on it's original release date or on 19th November.
All that potentially could happen now is that people will say sod it, I've waited this long, I may as well wait a bit longer and get the PS5 version.