Keep in mind that superconductors are not just useful for powerful electromagnets! They're also excellent for all sorts of other functions such as EM shielding,

Keep in mind that superconductors are not just useful for powerful electromagnets! They're also excellent for all sorts of other functions such as EM shielding, antennas, etc... High temperature superconductors are not likely to be useful as powerful magnets, but they can be useful for almost everything else.