> superconduction along huge distances is a likely no-go given pressures involved,
Pedantic note: they said only for this material, not a no-go in general. Not sure if you caught that.
"Strained silicon" is a technique for achieving faster frequencies in modern CPU by applying force to the lattice with another deposition layer. I wonder if properties of the lattice under pressure can be instigated either by similar process, or even during phase change when creating the material.