Superconductors have zero resistance up to some quench current, so you can’t just put infinite current through a superconductor. If the quench current is low, t

Superconductors have zero resistance up to some quench current, so you can’t just put infinite current through a superconductor. If the quench current is low, the superconductor is not practical. Even practical superconductors might have a quench current only 4x what you’d put through traditional copper before the ohmic losses become too high.