nostr:npub107wnkjl6crsjs73ukvfjwd89wpvtfcwqdpwnf4xmqfts2pam9deqk89n4a
His ceramic argument is that you can't make it into wires to wrap around into coils.
This was true until about that past decade when companies figured out ways to make tapes and wires out of the stuff.
https://en.wikipedia.org//wiki/Superconducting_wire
https://en.wikipedia.org/wiki/Yttrium_barium_copper_oxide
Not sure why you are mentioning semiconductors. They aren't wound into wires either...