"The Language Instinct: How the Mind Creates Language" by Steven Pinker - audiobook review

I read a chapter of this book at university and remember really enjoying it. I think it was chapter 12: "The Language Mavens". At the time I was interested in notions of correct grammar and standard English. I found it to be persuasive: that artificially imposed grammar rules (such as you shouldn't split an infinitive or shouldn't end a sentence with a preposition) are unnecessary and meaningless. I enjoyed listening to that chapter again, but it's quite different from the rest of the book, which, although written for a general audience, is still quite academic and thick in the weeds of linguistics. It was interesting but, to be honest, not much of it has stayed with me on the surface level of knowledge since I read the book. I'm not sure how much of it is original research by Steven Pinker, or whether he's just synthesizing the research of others.