Superconductors have near-perfect electric conductivity and can significantly boost transistor efficiency. Besides being of utmost important for the IT&C industry, superconductors can also revolutionize other technologies, including maglev railways, magnetic plasma fusion reactors, electric car engines and medical MRI devices.https://www.notebookcheck.net/Scientists-manage-to-synthesize-LK-99-superconductor-compound-ushering-in-a-new-era-for-ultra-efficient-transistors.738257.0.html
this article completely misrepresents what causes a transistor to create waste heat. It is not due to "current leaks". It is due to switching speed. Superconductors cannot really switch at all, at least not in anything like the sense transistors do it. Superconductors will not improve semiconductor performance any more than regular conductors would. By your logic, Why not just make a computer chip out of copper? It conducts better than silicon!
This material, even if it works as initially advertised, only supports a tiny current load, beyond which it loses superconductivity...If I understand correctly.
Superconductors don't have "near" perfect conductivity. They are actually perfect. They have exactly 0 resistance.