Why are REBCO tapes so important? Apparently a REBCO cable, when it is chilled to 77K (think liquid Nitrogen) becomes superconducting. When it becomes superco

Why are REBCO tapes so important? Apparently a REBCO cable, when it is chilled to 77K (think liquid Nitrogen) becomes superconducting. When it becomes superconducting, it can carry a lot of amps, and when it can carry a lot of amps, it can generate quite an impressive magnetic field, e.g.: "On April 7, a team led by MagLab engineer Seungyong Hahn tested a small but potent magnet made of rare earth barium copper oxide, or REBCO, which efficiently conducts electricity without any resistance at relatively high temperatures and magnetic fields. Putting the magnet coil inside one of the MagLab's strongest magnets, the team achieved a magnetic field of 40.2 teslas." https://nationalmaglab.org/news-events/news/new-approach-to-building-magnets-yields-new-world-record https://nationalmaglab.org/news-events/news/new-approach-to-... Related: >"Research team generates world-record 35.4 tesla magnetic field using a superconducting insert magnet" https://www.nextbigfuture.com/2012/01/research-team-generates-world-record.html https://www.nextbigfuture.com/2012/01/research-team-generate... https://phys.org/news/2019-03-energy-efficient-superconducting-cable-future-technologies.html https://phys.org/news/2019-03-energy-efficient-superconducti... >"For connecting wind parks, for DC supply on ships, or for lightweight and compact high-current cabling in future electric airplanes: scientists of Karlsruhe Institute of Technology (KIT) have developed a versatile superconducting cable that can be manufactured easily. In case of moderate cooling, it transports electric energy with hardly any losses." https://www.frontiersin.org/articles/10.3389/fphy.2019.00082/full https://www.frontiersin.org/articles/10.3389/fphy.2019.00082... >"Superconductive REBCO Thin Films and Their Nanocomposites: The Role of Rare-Earth Oxides in Promoting Sustainable Energy" https://en.wikipedia.org/wiki/Rare-earth_barium_copper_oxide https://en.wikipedia.org/wiki/Rare-earth_barium_copper_oxide Etc.