We have developed superconductivity. MRI scanners wouldn't work without it. The problem is that it needs to be cooled to very low temperatures, which requires c

We have developed superconductivity. MRI scanners wouldn't work without it. The problem is that it needs to be cooled to very low temperatures, which requires complicated plumbing and expensive cryogenic gases. Not really something viable on an aircraft. Superconductors have been slowly improving in operating temperature though - perhaps the temperatures found at aircraft cruising altitude are within reach?