I don't think
@Cbdb2 is disagreeing with Feynman.
What I am perceiving is a misunderstanding of the Poynting vector. It is a cross-product of the E&B fields, calculated at a point is space, or perhaps integrated over a space if one so desires. So close to a source it will point out from the source, but not necessarily towards the load at that point in space, and it will point in towards a load if the point is close to the load, etc. When we say the Poynting vector points from source to load, we mean if we take a cut in space between the two and integrate the cross product. Localize direction will be different.
Man, all I wanted to do was show people that the energy doesn't transfer thru the copper,
Maybe I over simplified to make the point. Of course the vector points in various directions if the field is not homogeneous and isotropic but the "average" (integrated over the surface perpendicular to the conductor) points to where the energy goes. Take an infinite surface perpendicular to the wire and from the energy that flows thru it figure out the difference in energy that flows into the wire, compared with the load, these are the wire R losses (only if it has resistance, otherwise theres no E field (voltage) in the wire). That will give you the angle of the "average" Poyting vector. Which seems a more useful concept than saying the vector is straight into the wire at the wire surface and parallel to the wire at a distance, and all the angles in between. When the wire has resistance its a load and it changes the direction of the vector.
Wikipedia
"If a conductor has significant resistance, then, near the surface of that conductor, the Poynting vector would be tilted toward and impinge upon the conductor. Once the Poynting vector enters the conductor, it is bent to a direction that is almost perpendicular to the surface.
[13]: 61 This is a consequence of
Snell's law and the very slow speed of light inside a conductor. The definition and computation of the speed of light in a conductor can be given.
[14]: 402 Inside the conductor, the Poynting vector represents energy flow from the
electromagnetic field into the wire, producing resistive
Joule heating in the wire. For a derivation that starts with Snell's law see Reitz page 454.
[15]: 454 "
And in a real cable:
From
https://www.chemeurope.com/en/encyclopedia/Poynting_vector.html
"For example, the Poynting vector within the dielectric insulator of a coaxial cable is nearly parallel to the wire axis (assuming no fields outside the cable) - so electric energy is flowing through the dielectric between the conductors. If the core conductor was replaced by a wire having significant resistance, then the Poynting vector would become tilted toward that wire, indicating that (some) energy flows from the e/m field into the wire, producing resistive
Joule heating in the wire."
Are we done yet?