If you solve your cooling problem in space by distributing 10000 servers across 100 orbits then you replace one engineering challenge with the next; good luck with the satellite-satellite optical crossbars, and even more with the time travel beam shapers to get the communication latency between the components of your "orbit-distributed data center" to-target.

(the sarcasm is intended; there are some usecases for "space servers", around stealth for sure; to "scale it like a terrestrial DC" though ... dunno; not matter how I turn it, it just seems crazy expensive)