Musklerian Jihad when
"I think we should be very careful about artificial intelligence. If I were to guess like what our biggest existential threat is, it’s probably that."
Seriously? Tomorrow a specially engineered pathogen can go AWOL from USAMRIID or some Monsanto biolab, nuclear war may start over any necon-coveted land with trace amounts of petrol, meteoroids may wreck our shit, ecoysystems may go titsup making the post-bronze age collapse look like a walk in the park, and he's worrying about AI?
Megahint: Unless the AI manages to P-ify NP, it's not going to magically transform the humans into computronium appendages.
Plus, it's kinda hard to produce cheaply unless functioning nanotech assembly is invented first. The jury is still out on whether that is even possible.