If RTSCs turn out to be viable, they would reduce power transmission costs by maybe 10% for our current infrastructure. That's just because we don't build power

If RTSCs turn out to be viable, they would reduce power transmission costs by maybe 10% for our current infrastructure. That's just because we don't build power lines over distances where the losses would be much greater than that, because it doesn't make sense. But they would also enable new infrastructure beyond what is currently feasible, because we could transport power over much longer distances without any increased loss. For example, you could transport solar power from the daylit side of the earth to the night side.