@djones51 You quoted from Wikipedia without understanding. Energy is delivered on the outside of the cable, but in case of coaxial cable it is limited to space inside. In coaxial cable whole energy flows thru dielectric between inner wire and the shield. Also, picture in Wikipedia shows how this energy flux gets to load.
In the case of a fluid metal, the entire cross section and length is like a foamy permeable skin. There is no definable junction or surface.
Hence the comments from me abut it acting like a plasma. Ionic, as in charged. As that is the influence aspect of the load.
A wholly different beast than wire and it requires quantum aspects or fully blown QED to describe it.
It is far more complementary to the signal and compatible with it... than any mere (and primitive, incomplete, ill thought out) wire could ever possibly be. :)