A fair point, but given how the best places to build solar infrastructure tend to not have easily accessible large volumes of water, I should think that economies of scale can apply if we were to put actual investment into scaling up the gravitational potential. Sure, it's not a geometric law like for kinetic energy, but greater height and greater mass are both trivial quantities to scale in places with large empty areas. I'm simply pointing out that we've never invested in that obvious possibility as a civilization. Am I missing something obvious that makes the scaling non-viable?
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