Carbon conductors

Now these type of cables are rare indeed. I think Van den Hul was the first to realize a carbon-based metal-free cable for audio, this was a long time ago and now they’re bringing carbon nanotube cables to the market!
(How come is A.J. Van den Hul not more widely known, even outside audio? The man’s a genius and a Character with capital C, an apparent polymath even, but maybe he dislikes fame)
There are sparse comments, mostly positive actually, on carbon cables. Apparently they’re extremely synergy-dependent and can sound from terrible to glorious. Interesting!

Anyone heard such cables? Hypothesis and theory appreciated on what’s the EM nature behind their merits.