The R/L/C combinations of cables on different speakers and lengths do have some impact. Zip cord wiring doesn't do very well with electrostats but may do well with typical dynamic loads. There are different needs requiring consideration. As for the jewelry inspired, nuclear industry certified gimmickry, there are those elitists willing to spend a lot of money for bragging rights. Once the signal gets to the speaker, the needs of the internal connection isn't as critical but there is always room for subtle improvements. I was given a guideline that says to spend 10% of your budget on cables/cords.