I heard a rumor that the big guys did the math on the energy costs for running the compressors to keep nitrogen or helium liquid and compared it to their projec

I heard a rumor that the big guys did the math on the energy costs for running the compressors to keep nitrogen or helium liquid and compared it to their projected cooling cost for normal computers and found that the compressors were cheaper. Trick is, apparently no one has a good story for super conducting circuit parts, so everyone has to start from scratch.