Not sure what you're saying here, YBCO and related materials become superconducting with liquid nitrogen temperatures

Ok, I was incorrect there. I was thinking more about industrial application potential. There are some cuprates which are SC above -196C, there are some materials which are SC there under some enormous pressure and so on. They are not quite useful for us today, and the research in them is slow. As soon as someone will create industrially applicable SC with LN temps it will be a world revolution, in medicine first of all, then in research and maybe electronics etc.

But my point was not about the old inventions, but about this new PCPOSOP material. Researchers claim an insane jump to -23C (maybe) superconductor which is highly suspicious on it's own. It's like some researchers will claim they have discovered some material with a melting point of +10000C at 1 atmosphere. Sure, maybe. But the fact that materials with melting points between +4000C and +10000C are missing is super suspicious.

> non-existent -196C SC

What do you mean? Copper oxide superconductors are known and made for more than 30 years.