Comment by TeMPOraL

> Cooling is conspicuously absent other than a brief mention in the conclusion.

It's not absent - it's covered in the paper, which this blog release summarizes. There's a link to the paper itself in the side bar.

> In fact everything in this paper is already solved by SpaceX except GPU cooling.

Cooling is already solved by SpaceX too, since this paper basically starts with the idea of swapping out whatever payload is on Starlink with power-equivalent in TPUs, and then goes from there.