Future of cables!

You still haven’t explained why is it necessary to connect the copper or banana plug or whatever we use to the speaker since the cable doesn’t carry the energy but it’s carried outside the cable.

Without this connection there will be no electric current, hence no magnetic field.  It is necessary to have both magnetic and electric field to create energy flux.

I read the article it’s just as I expected you are using the terms WIRE and CABLE interchangeably, they aren’t the same thing. In the article you just posted they were talking about the energy running parallel to the WIRE which is inside the INSULATION of the CABLE. WIRE is the metal inside the CABLE, there is a small electromagnetic field OUTSIDE  the CABLE but it is the one INSIDE the cable BUT on the surface and outside the WIRE that Carries the current.

You're right, It should be "outside of wire" (and not cable) or "in the space between wires".  There is only magnetic and no electric field on the outside of the cable, so energy flux cannot be created there.

That's what I though it was a misunderstanding in the language.