That would be better than the physics equivalent of cold fusion (which seemed promising at first, but turns out to not exist - at least so far). Only time will tell, though if it really is, but so difficult to replicate that we need a few hundred years it may as well never exist for purposes of our lifetime.

Assuming that replications fail but they really do have samples of a superconductor that can be thoroughly examined, this is still fantastic.

Once we know the exact structure, the problem of synthesis is very solvable.