while what you describe is imaginable, I don't think this is the case, as physicists would then speak of "superconductivity at temperature T for a material in phase X formed at pressure P", not "[ ... ] superconductivity at megabar"
Perhaps you also think the claim states room temperature conductivity, and one only needs 260K temperature to form this phase?
When the title is phrased like it is, it usually describes a point or region for the equation of state
Good point on the state. One good thing from such research results even if impractical itself can yield good targets for future research. If it’s a matter of geometry or crystal lattice spacing from the pressure an alternate formulation might be able to make a meta-stable structure that induces superconductance. Perhaps there’s another part of the state diagram that could be modified.
Indeed. It is important to pursue research even if there is no immediate benefit from it. In this case it is even touching on a gateway technology I would call marvellous. Stable high temperature superconductor material would change so much.
Perhaps you also think the claim states room temperature conductivity, and one only needs 260K temperature to form this phase?
When the title is phrased like it is, it usually describes a point or region for the equation of state