I really hope this unlocks a class of superconductors and isn't a bizarre oneoff compound, because the EPA of 2023 is not going to let us wire the country with thousands of miles of lead-based ceramic wire.
I am making a political claim that bureaucrats will behave in certain, highly predictable ways.
If the material proves to be what it claims to be, it will not be banned. At most, it will be highly regulated, as that will preserve and expand government power.
It just needs proper handling and isolation.
We don't have reliable process to produce them in large quantity
Once the cable is laid, it's a liability.