alt Hacker Newshave you ever seen a detailed photo of the ISS?
* https://images2.imgbox.com/64/4b/GhtUtq1m_o.jpg
look at how massive the solar panels and more importantly the thermal radiators are outside
compare to the size of the human habitat tubes
"AI" in space would demand as much if not even more for each node
The hotter you are, the less radiators you need for the same heat dissipation. The ISS needs to run at human-comfort temperatures, but a datacenter can run much hotter than that (note the "at 60 °C" in the article). I forget the scaling parameter, but it's like T^2 or T^4 or something like that, so running hotter makes a huge difference.
Of course, that's offset by the enormous heat output of a datacenter. I'm not saying it's viable, just that you actually need to do the math instead of eyeballing the ISS radiators.