I think this means production of usable superconducting masses will be tricky, if its even possible.
So... Probably on the longer side? Time will be needed to figure out how to make it macroscopically, or discover a similar compound thats easier to produce in bulk.
But once wire, coils, high purity samples and such start getting sold, I think the adoption would be very quick.
But I dont want to jump to conclusions. I dont think its a drop in replacement for, say, the copper substrate.
If this turns out to be a super conducting material you can be assured that overnight there will be many thousands of people all around the world, from academic, corporate, government, and private labs working with the new theory and materials and discoveries will occur as our understanding of the phenomenon get deeper and wider. There will be so much incentive to find new methods and materials that have the properties of this material.