That would suggest that a very high quality sample would superconduct at room temperature.

Unless the "low quality" part is actually causing the superconductivity. Remember the multiple simulations that showed Cu replacing Pb at a less favorable site (energetically) was better for superconductivity than at a more favorable site. It's possible "high quality" samples actually have less "imperfections", which seem important for the superconductivity.

Exactly it's quite possible that 'worse' is actually 'better' and vv. I'm sure that it won't be long before that will be resolved though, this is all happening so fast that such important answers will be sought by more than one team.

Not necessarily, but possibly.

Due to how these materials behave, this likely means you can manufacture a real-deal UFO in orbit…

what? give me an effective field theory for that lol because that is not a thing

Of course I can't but https://www.nature.com/articles/s41467-018-06707-y maybe