The user doesn't have to be someone that grew up on Defcon talks and CTFs anymore though. Any Joe/Jane off the street can ask an LLM what is a JTAG or what is a 90 nop and keep asking until they're satisfied. So we have to assume the user is capable of all of those things.

We used to have these things called "books" that you could ask. (And if you didn't know which book to consult, we had these people called "librarians".) I don't think it's a much greater threat surface than before: if anything, it might be smaller, because the internet is harder to search.

As someone who grew up with libraries, card catalogs, microfiche, and an encyclopedia, I can confidently say that talking to and working with an LLM is much faster, much easier, and much more informative than all of the above combined.