In 1945, Richard Feynman and John Wheeler ( Rev. Mod. Physics, vol 17, p. 157) proposed a theory of the electromagnetic force in which the force was actually a 'transaction' between the source and the absorber. Accelerated charges do not emit electromagnetic fields in a space free of charges; fields which act between two bodies arise only because of the presence of other bodies; and the strength of the force is time-symmetric and singularity free and depends on 1/2 of the difference between the advanced and retarded electromagnetic field.
It was called the 'absorber' theory because it was based on an earlier, 1922 idea by the german physicist Tetrode who stated that "The Sun would not radiate if it were alone in space and no other bodies could absorb its radiation".
To my limited knowledge about these kinds of tests, the decomposition of electromagnetics into advanced and retarded components is OK as a local special relativistic procedure, but since it doesn't take into consideration the global properties of space-time, there is something missing from it as a completely self-consistent procedure at large scales. The Partridge experiment just demonstrates that EFFECTIVELY thee universe behaves as an infinite system in its past and future, but we know from Big Bang cosmology that at truly cosmological scales, its past and future may be quite asymmetric.