Startup aims to transform the power grid with superconducting transmission lines

That makes sense from the theoretical point of view, but runing a vaccum tube for kilometers with liquid nitrogen inside with some superconductor inside looks very difficult.

> Last year in Woburn, Massachusetts, a power line was deployed across a 100-foot stretch of land.

It's a good start, but very short in comparison to power lines. Did they deploy the line on the floor or hanging in the air where wind and birds can deform it?

> VEIR’s first alternating current (AC) overhead product line is capable of transmission capacities up to 400 megawatts and voltages of up to 69 kilovolts,

That's almost 6000 Amps. I'm not very updated with modern high temperature superconductors, but they use to not like very high currents.