How do the laws of physics allow it? How do you disperse the heat? How do you protect your compute from cosmic rays? How do you get enough solar up there without catastrophic damage from micrometeorites?

Ars Technica is doing a series on this. They have published 2/3 parts so far. https://arstechnica.com/space/2026/07/how-hard-is-it-to-buil...

I think the company that has managed to launch and currently operates ~10k satellites can figure those out. Still remains to be seen if the economics make sense, but with increased "anti" stuff happening all around (some of which surely is manufactured) who knows? 5 - 10 years from now things might change.