I don’t see “high temperature” specified. 100 degrees Fahrenheit? 4,000 degrees?
L
The aim is for room temperature.
I would understand that is mean relative to existing low temp regimes. For example, conducting high current in the liquid nitrogen range would be a big step versus transmission using liquid helium. At the SSCL (Superconducting Super Collider Lab) in Texas (before premature termination), the power supplies were typically 10,000-15,000 amps at 7-10 VDC when using liquid HE. The Cu conduits resembled 2x6 boards!