I wonder whether it might be possible to create a material using this and carbon nanotubes worked through it. With the idea that the nanotubes can create and hold the pressure for the superconductor to operate.
Engineering a wire under pressure whose whole length is compressed by a structure made out of carbon nanotubes is clearly difficult, but seems theoretically possible. It is very likely beyond our current engineering capabilities. But in principle it is a technology that we could try to develop.
For example at low temperature you assemble a wire that has a high thermal coefficient of expansion down the center of the wire. Then the superconductor around that in a ring. Then a carbon nanotube sheathe around that which traps things. Then when it warms up the core squeezes the superconductor against the sheathe and you get the pressure.
When you hit one end the wire with a hammer, or drop something on it, the entire wire might explode.
The whole excitement about room temperature superconductors is getting rid of the difficulty of cooling, the difficulty of this pressure requirement is easily much worse.
Then you make it feasible.
And then you make it practical.
One step at a time.
Though I think we could go a long way with the liquid nitrogen temp superconductors now on the market. It's still going to be a real chore to design around, but it's got to be a lot easier to deal with liquid N2 than liquid He.
Similar to a CS paper showing a new algorithm e.g. sorts with x% less swaps than quicksort, it might not actually lead to a performance increase on real hardware.