I don’t agree. I do not believe equipment exists (yet) to measure the burn in/breakin of cables. But if you had the audio equipment and ears you would be a believer.
I remember feeling the same way as you do now many years ago about power cords. I felt how can a power cord change the musical sound quality? I was sure they would test the same. Wire is wire...right?
But a dealer gave me a Synergetic Research Master Coupler to take home and try. When I first connected it up, I was convinced as you are now that it could not possibly make a difference. Then I cued up the first song and ... huh? How can this be? More bass, bigger soundstage??? Just from changing a power cord that is supposed to be the same gauge? Can’t be...
From that day on I was convinced that we really don’t know as much as we think we know when it comes to sound quality, equipment, and yes cables. Measurements can only test OHMs Law.
ozzy