You're not going to fit a data center in a Starship either, unless you are talking a Tiny Corp Exabox "data center in a shipping container" sized one. Even something that small (1MW) would still need 4x the solar capacity of the ISS, and therefore likely some assembly required. Then you've got latency from satellite to satellite ...

In any case, it appears that Musk can't even generate enough AI demand to utilize his own ground based data center. Maybe he can add "data centers in space" to part of his Mars colonization plan. Maybe have Tesla Bots driving around in Cybertrucks too ?