Redundancy requires spare capacity. Economic efficiency requires running at close to full capacity. What we're seeing is conflicting priorities. After things

Redundancy requires spare capacity. Economic efficiency requires running at close to full capacity. What we're seeing is conflicting priorities. After things normalize, we'll probably go back to just-in-time, full capacity production. But there is a real and separate issue to debate w.r.t. globalization, and it has to do with international politics, and how safe it is to put one's well-being in the hands of a rival. Redundancy and efficiency have nothing to do with this argument.