Now you tell me. I wonder how many amazing Pharaoh tombs I've missed out on over the years.
I've seen some pretty amazing Pharaoh's tombs - when I went on an Egypt tour in the 1970s including a 5 day boat ride down the Nile to reach some of them.
In my 40+ year experience in 2 channel audio, I've also toured some great cables and components.
What follows is all IMHO, IMOE (own experience), based on exploring many rabbit holes and YMMV. Probably will.
If you can't hear it, simple, it does not exist - for you. That is absolutely true. I can never disagree with anyone's experience.
Differences in cables and their terminations will or will not be heard depending on the rest of, that is all of the components in the signal path. If just one component lacks the sufficient resolution, then something won't be reproduced and won't be heard. I've thought I wasted money on cables when I heard no change. New pre-amplifier, big upgrade, wow ! Holy . . . goosebumps. Naw, can't be? Must just be the pre or my expectation, desire. Weeks of A/Bing cables with new pre - Yup, big additional improvement added by the cables. And not just because I wanted it to be so.
XLR terminations were first develooped for the professional sector, recording with microphones on long cables, needed secure connections that couldn't accidentally disconnect as performers moved or gyrated around the stage. With very long cables more power was also needed to maintin fidelity. In genuine XLR interconnects there are three "wires" one for each audio channel and a separate one for power, some have a fourth wire for a dedicatd ground. Deliberately isolated from oneanother. Like high end USB cables, separate signal and power through separate wires isolated from one another. Lke transformers get isolated from signal path in components, even to the extent of numerous "2 box" systems with power and signal processing in completely separate chasis. Think DCS (or dcs) and Holo Audio May, both highly regarded and sounding quite different.
This is from an old memory file in my head, so if I'm wrong, I welcome correction.
Different high end cable manufacturers voice some of their cables for a particular sound. Case in point, I am planning on getting some new (hopefully used or dealer demo) interconnedts for the head-fi system between DAC and Amp. Now using interconnects borrowed from 2 channel system where they are very neutral and revealing of great nuance, perfect there but a little too austerely detailed for the head-fi setup. The same cable manufactuer makes a cable voiced so that is deliberately a warmer and mid-range forward. I want it.
betula nailed it: "It depends on what you find inside.

" In this case, inside your head between your ears and inside that part of your heart that is moved by music.
Again, not criticizing anyone or making anyone wrong. This is all IMHO & YM will V.