academic AI researchers have passed him by.
Just to be pedantic, it wasn't academic AI researchers. The current era of AI began here : https://www.npr.org/2012/06/26/155792609/a-massive-google-network-learns-to-identify
Academic AI researchers have never had the compute hardware to contribute to AI research since 2012, except some who worked at corporate giants (mostly deepmind) and went back into academia.
They are getting more hardware now, but the hardware required to be relevant and to develop a capability that commercial models don't already have keeps increasing. Table stakes are now something like 10,000 H100s, or about 250-500 million in hardware.
https://www.semianalysis.com/p/google-gemini-eats-the-world-gemini
I am not sure MIRI tried any meaningful computational experiments. They came up with unrunnable algorithms that theoretically might work but would need nearly infinite compute.
Personally I imagine him as a cult leader of a flying saucer cult where suddenly an alien vehicle is actually arriving. He's running around panicking tearing his hair out because this wasn't actually what he planned, he just wanted money and bitches as a cult leader. And because it's one thing to say the aliens will beam every cult member up and take them to paradise, but if you see a multi-kilometer alien vehicle getting closer to earth, whatever it's intentions are no one is going to be taken to paradise...