Strange to me that it could have been just like a large, small-opening 'net' of metal of some kind, and just supported from the top and bottom. But then we designed by committee and ended up with a large space frame and a tartan weave mesh of varying density? What happens when the tube frame inevitably starts to corrode?
Don't get me wrong, I like the big swing of this architectural gusto. But still, everyone's an expert!
Still think it would have been amazing to just get this flat piece of art:
https://nedkahn.com/portfolio/wind-arbor