I'm not very informed on SpaceX plans, but one thing I think people gloss over is how much maintenance a data center requires. Parts fail, computers get stuck on crash loops, etc. A space data center would need workers - computer people, not astronauts - and a constant supply of parts tob replace hardware. Whoever wrote this proposal doesn't understand neither space nor data centers.

Is a data center satellite really that different from a communications satellite? Starlink sats must have some significant processing power and nontrivial control system, and they work without physical maintenance. One data center sat is like one server rack, if it fails, it's fully lost and you just deorbit it, as it's done with Starlink sats. They sent 12443 Starlink sats to space, deorbited 1684. The thing that matters is failure rate, and the economics resulting from that. And also the cost of specialized resilient hardware.