notahacker parent
Orbital assembly of a fluid piping system in space is a pretty colossal problem too (as well as miles of pipes and connections being a massive single point failure for your system). Dispersing the GPUs might be more practical, but it's not exactly optimal for high performance computation...
It’s a fun problem to think about but even if all the problems were solved we would have very quickly deprecating hardware in orbit that’s impossible to service or upgrade