@ghasley I hear you, no doubt that good people with great ears hear huge improvements with cables, I have drank the Kool Aid myself just in case I was wrong. Hey I have over 70 speakers in my house and 4 Dolby Atmos systems, 1 professional.
its really bad when the salesmen who distribute the cables can't tell you why they sound better. I was starting in the music studios when digital came out, they said the handshake between components was the key it was either a 1 or a 0 and there wouldn't be so much distortion that the numbers would get flipped apposed to analog where there was a variable handshake with an infinite opportunity to make errors. There are fancy ways components look at digital signals now but generally that's still the case and if the cable can pass a 1 or a 0 it doesn't matter haw much the cable costs.
When the cable is a BNC the dielectric is important it can change the timing of the 1s and 0s, it turns out the timing/impedance of the information in the cable is the most important aspect of digital cables. The timing of the signal in the cable is always the same if exotic dielectrics are not used. The idea that high frequencies move at a significantly different speed around the outer edge of the cable is silly. As I was saying before the latency in any and every digital circuit makes much more difference than any cable skin effect, this is where the snake oil comes in. No one in professional audio cares about designer fluff fluff cables it simply never happens if there was a significant time difference in the high frequency recording engineers would have to deal with it and we don't.