Heat isn’t the blocker. That was peanut gallery crit.
To be a “data center” and used for training you need hundreds of thousands of GPUs just a few meters apart – not hundreds or thousands of kilometers.
If having them spread out is okay, then so would putting them into smaller racks distributed around the world like telecom.
If energy is the argument, you have to deal with the actual economics. Energy accounts for ~5% of the cost of a modern data center. It’s maybe 2% for a Vera Rubin rack.
Given the life expectancy of a satellite like this, you’ll never recoup the cost of putting it into space.
We’ll see SpaceX launch a bunch of satellites doing inference, but by the end of the decade the amount being done in space will be tiny and SpaceX will continue building more Colossus data centers on earth.