I'm not trying to convince anyone, one way or the other; but I do believe in cable and connector improvement......to a point. Either way, it is easy (and cheap enough) to find out for oneself.
Buy a nice 5' piece of high quality power cable, VHAudio carries excellent bulk cable from Furutech, Neotech, Oyaide....at competitive prices. DHLabs also has nice bulk cable.
Buy connectors with different plating (Silver, Rhodium, Copper, Gold), from someone like SonarQuest; who make excellent power plugs with all 4 platings. Make a cable, interchange the plugs, see if it makes a difference in your mind or not. I did, and there are definitely differences.....some I liked, and some I did not. For example, I much prefer Silver plating over Rhodium for a more detailed presentation.

