I swore I wasn’t going to go down the rabbit hole-
I have a main system with what are probably regarded as expensive cables.
But I am still in the process of assembling a vintage system in another room, based on a pair of the original Quad ESLs that I bought in in 1973 and recently had restored. I decided to try and stay within the period- when I used them beginning in 1973, it was zip cord. So, I bought some 12 gauge all copper stranded wire in bulk. The system sounded fine--I hadn’t heard these speakers in years, and had never used them with the Quad II amps, which were also recently restored and re-glassed with GEC KT 66s, among other recherché tubes.
I asked a friend on another forum who had far more recent experience with the speaker than me what he used. It was Canare 4S11, another DIY cheapie that I bought online. The Canare sounded "less rough" to my ears. I suppose I could try the Duelund that everyone has been raving about lately, or a few other low cost cables, but the point is, even among the bargain DIY stuff, there are differences. The terminations make differences too--I used to use bare wire. I’m now terminating with a relatively inexpensive Cardas banana, which I’m sure changes the sound in some way.
To say that cables make no difference is no different than saying "X" brand cable is "the best." There are so many variables that make up a system, and so many differences in what people hear (or want to hear) that it is impossible to make any broad generalizations. I suspect a lot of cable makers have theories about why their cables sound the way they do, but the literature is pretty empty- the hyperbole is far stronger, which makes people predictably skeptical, particularly because a lot of this stuff has reached crazy pricing.
This debate will not be resolved: I think you try what works in your system, and explore within the limits of your interest and pocketbook. The folks who have replaced their fancy audiophile cable with things like the WE or Duelund seem to have gone counter-market and should probably be applauded for doing so. (The longer I do this, the more I respect the capable DIY’er.)
A shout out to @nonoise for some very sensible comments in the audiophile fuse thread- something to which I never really paid attention, but nonoise and others on that thread had some rational explanations about the metallurgy involved; while I’m not going to rush out and buy a box full of fancy fuses, there was value in that thread to me.