I think Robin is skeptical because (1) he tried doing AI stuff and it was very hard and (2) misleading demos got tons of hype around the same time maybe and (3) he sees slow/​reasonable progress everywhere since forever with his econ brain. As Robin as Robin is he just got too much personal strong evidence against quick AI to Robin himself out of this error. That’s my limited understanding.
I think Robin is skeptical because (1) he tried doing AI stuff and it was very hard and (2) misleading demos got tons of hype around the same time maybe and (3) he sees slow/​reasonable progress everywhere since forever with his econ brain. As Robin as Robin is he just got too much personal strong evidence against quick AI to Robin himself out of this error. That’s my limited understanding.