It would be interesting if TBC commercialized a subterrene [1], and drove down costs of building underground structures to a tenth or hundredth of current. But

It would be interesting if TBC commercialized a subterrene [1], and drove down costs of building underground structures to a tenth or hundredth of current. But commercial mobile nuclear power is unfortunately not available. [1] https://en.m.wikipedia.org/wiki/Subterrene https://en.m.wikipedia.org/wiki/Subterrene