> from every perspective but cooling, radiation shielding, and cost/ease of installation.

Oh is that all? Those are major data center concerns.

Don't forget the biggest one: an ocean-based system could be pulled up and serviced without the need for a human-rated rocket. Oh, and bandwidth/latency.

The ONLY benefit of space is that it doesn't require siting a major construction in a town full of angry residents, and it has abundant solar power. But given how much it costs to get the solar panels in orbit, that power sure ain't free.