I mean yes, of course ground-based is cheaper if it's just part of a grid with lots of fossil power. I'm assuming we want to eliminate the fossil plants. For th

I mean yes, of course ground-based is cheaper if it's just part of a grid with lots of fossil power. I'm assuming we want to eliminate the fossil plants. For that, SPS at SpaceX Starship launch costs has a decent chance of being cheaper than ground-based solar plus the the various extra systems required to turn it into reliable power.