I continue to fail to see how this design solves the issues that can only be solved by breaking the laws of physics in cooling and shielding.
160 square meters, which if ran in optimum conditions would reject between 100 to 150 kilowatts.
Micrometeorites is not a significant concern. There aren't that many of them and 100% reliability is not required. If one is hit then you end of life it or de-rate it (i.e. shut down some of the processors or underclock them) appropriate to the lost solar energy or lost radiating power.
Server clusters already replace racks every 5 years or so and dispose of them. (It used to be ever 3 years.) How is this any different?