He was quoting Feynman, who wouldn't have been exposed to good evidence for missing/dark matter/energy at the time. I'm sure Feynman would have either included the "otherwise undetected matter which has gravity" or just called it "other natural forces". He may have left it as is though. Since the statement stands as is. As I read it, he means to say that ghosts, spirits, gods nor devils, karma, chockra, chi nor souls, nor glitches, hacks, or cheats from a simulator, have left any discernible footprint to observe.

Elon can announce things like no other! His announcements are unparalleled genius! If only other people could announce things like Elon could, maybe their companies could trade at a 190 P/E ratio too!

I don't think this will ever replace call centers completely. No matter how good this gets, it will always be a glorified phone tree. Unusual billing questions, account changes, account unlocks, new sales, all will need a human to verify the identity of another human until some kind of AI protection law comes up to keep companies from being sued for mistakes in their AI. I have yet to have any of my questions properly answered whenever I use those text based bots, for instance. Over the 20 or so times I've tried them.