First, Chomsky (and I) were talking about language acquisition in children where there aren't billions of examples, so it's completely irrelevant if some other

First, Chomsky (and I) were talking about language acquisition in children where there aren't billions of examples, so it's completely irrelevant if some other system can do something, the question is how do humans do it. Second, there isn't any evidence that LLMs have captured grammar rules in any meaningful sense, just as they can't do addition or any other recursive computation.