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Thanks for the interesting new thing. If they suffer no loss in kinetic energy and a wave can move forever, could we use a circular pool of superfluid as an an energy storage mechanism?

Maybe, but it's probably easier to just use a superconductor for the same: https://en.wikipedia.org/wiki/Superconducting_magnetic_energ...

Well, the whole thing must be at liquid helium temperature, so probably not practical ...

why there are no good videos of superfluids in action in the whole internet?

I thought https://youtu.be/2Z6UJbwxBZI was pretty good, even if it's low res from being a bit dated.

there’s not a single high-quality video anywhere. Science YouTubers need to get on this

Superfluids have been around for ages - we call them beers.