[PaulHoule]

Certainly the very low costs that are quoted for solar energy depend on centralized installation that have economies of scale. Rooftop solar doesn't come close, although it doesn't have the land use problem that centralized solar facilities have.

As for nuclear, micro != cheap. As with solar, larger nuclear plants have better economics. One of the reasons why we've struggled to move from FOAK (First of a Kind) to NOAK (Nth of a kind construction) is that when we successfully build a reactor we think "gee the economics aren't that good, maybe we have to build a bigger one" and had they actually built a NuScale they probably would have come to the same conclusion.