Simply put, you don’t. Your DC is launched into its graveyard. If a chip burns out it burns out—maybe rack design is a bit more redundant to keep failures as independent as possible.

Maybe at some point repair is a valid optimization. But it’s not necessary for an MVP, namely, one that is competitive against 3 to 5-year terrestrial delays and sub-10% costs of capital for such projects. That’s what has surprised me.