He predicts it might be possible from model math but doesn't actually say what his prediction is. He also argues it's possible we are on a s-curve that levels out before superhuman intelligence.

I think if we do want to do this then banning bitcoin proof of work behaviours seems far more important.

How about the silly treadmill where we waste billions of compute to compute useless proof of work type behaviours and whenever more compute gets thrown at the problem we just make it harder to ensure there isn't better output. I believe it was called buttcoin or something silly like that.

This critique is fairly strong and offers a lot of insight into the critical thinking behind it. The parts of the math I've looked at do check out.

Parts of this do align well with how to maximize profits. Shared walls, progressively smaller units over time and removing balconies have been the story of condo buildings over the last generation. The area that doesn’t line up is the low end apartment fixtures. It turns out people will pay $15k for $10k better of appliances and countertops.