i don't have any data here, but I am dubious that a room temperature superconductor will bring down the price of MRI machines. a room temp superconductor only saves you a dewar, about $50k of liquid helium and a cryocooler. you still have to build the rest of the MRI, which is an _extraordinarily_ sensitive instrument

> Fires, particularly house fires would become less common as wires simply stop conducting when they are overloaded.

depends how sharp the phase transition is.