Vinokur said, "but there is no reason why the approach we used should be restricted to just low-temperature superconductors."
Should be "but we currently know no reason"...

Ultraconductors are polymer equivalents of ambient temperature superconductors.

They are useful from the region of 0Kelvin up to 200 degrees C.

See the Chava Energy website.

They are presently thin films with the conductivity normal to the film. Wire is on the horizon. Current density is presently estimated at 1 Billion amperes/cm2.

The behavior of quantum vortices is different and way more complex, than the behavior of vortices in fluids, yet the analogies of the above experiment exists here. The motion of vortices is the source of energy dissipation in both cases. The effect of shark skin, owl wings or golf ball dimples is based on the fact, that the division of large vortices into smaller ones not only doesn't increase the fluid drag, it can even decrease it. The application of magnetic field to the niobium nanowires decreases the size of quantum vortices there, which makes their motion easier. The Latin saying "divide et impera" is based of Machiavellian approach, in which the dividing the opponents into smaller groups makes their penetration and occasional defeat smoother.