I was thinking of the CGI render at the top of this page: https://qz.com/1355672/stacking-concrete-blocks-is-a-surprisingly-efficient-way-to-store-energy/ https

I was thinking of the CGI render at the top of this page: https://qz.com/1355672/stacking-concrete-blocks-is-a-surprisingly-efficient-way-to-store-energy/ https://qz.com/1355672/stacking-concrete-blocks-is-a-surpris... You're right, linear may be a better use of resources, since you don't need thousands of towers, each with their own crane/generator system. I don't know. But this is a battle against cost, in an industry where the required 10x or 100x is impossible.