Singularity
The technological singularity—or simply the singularity—is a hypothetical future point in time at which technological growth becomes uncontrollable and irreversible, resulting in unforeseeable changes to human civilization. According to the most popular version of the singularity hypothesis, I. J. Good's intelligence explosion model, an upgradable intelligent agent will eventually enter a "runaway reaction" of self-improvement cycles, each new and more intelligent generation appearing more and more rapidly, causing an "explosion" in intelligence and resulting in a powerful superintelligence that qualitatively far surpasses all human intelligence.
— Wikipedia
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I think there's a decent chance this new material could be mass produced if the superconductivity holds up. The synthesis seems pretty straightforward - just a solid state reaction at high temp using commercially available stuff like PbO and Cu. No crazy high pressures needed either.
The key strained interfaces are made by substituting some Cu for Pb, so they'd need good process control to get that 0.48% shrinkage right every time. And you'd need access to testing gear like XRD and SQUID to validate the superconductivity, which might limit who can manufacture it at first.
But on the whole, seems like existing ceramic production lines could likely be adapted to churn out boatloads of this material if there's demand. The superconductivity at 400K would be a total game changer if confirmed. Fingers crossed they can work out any kinks in scaling up production, because I'd love to see some real world applications!
Is this needed for a production process? If you can fill it with current to the target field strength and come back in a day then it does the thing, nobody needs to care about some specific test.
I mean you wouldn't need to test every piece of material coming out of your production line, but you might want to run them on some representative sample to ensure the consistency and quality of your production process. Small changes in your production process can veer you away from perfect superconductivity, and so you want to test at a high enough resolution to ensure it's working as expected.