> But then he never answers that fundamental question

The fundamental question is “is it economically viable”, and the answer from his model is “not really”

> A constellation of 40,000 satellites with GPUs “infrastructure that makes it easier for humans to keep spreading out”?

I think he’s claiming industrializing larger and more economical power generation in space, as well as the means to put it up there, would make it easier to transition to a theoretical space economy

> But isn’t that precisely what everyone has been saying?

From the article, he claims that people handwave the economics, so at least the people he has interacted with haven’t been saying that.