No, because you're misunderstanding what electricity is and how it propagates. Electricity is disturbances in the electromagnetic field. A difference between t

No, because you're misunderstanding what electricity is and how it propagates. Electricity is disturbances in the electromagnetic field. A difference between the electromagnetic field on the surface of the conductor, super or not, and the empty space around it. What conductors do is to propagate that field, perfectly in the case of superconductors, across their surface. It is not necessary for surfaces of pieces of the superconductor to actually touch to propagate that field. There can even be stuff in between, if it doesn't conduct it won't heat up and usually won't disturb the superconductivity. (what it does is it slightly lowers the point, in current, where superconductivity breaks down) So you can just stack them close to each other in our 3 traditional dimensions, because the superconductive region doesn't have to be continuous, just close enough. That will work fine, that's how it works in current superconductors.