> Cooling the transistor to 77 K also offers greater sensitivity between the device’s “on” and “off” positions, with a smaller change in voltage needed to switc

> Cooling the transistor to 77 K also offers greater sensitivity between the device’s “on” and “off” positions, with a smaller change in voltage needed to switch from one state to the other. This can significantly lower power consumption. I might be way off, but I'm under the impression that keeping a chip supplied with liquid nitrogen (which constantly boils away) would greatly increase power consumption of the entire system compared to a conventional equivalent.