Spl: I use vdH carbon cables and am pretty familiar with the claims they make for them. FWIW, the info you quote from their site isn't about what you asked, i.e., that cables might somehow "wear out" due to conduction of electricity over time. (Personally, I give about as much credence to that theory as the LOLlers above.)
The passage you quoted is about the physical properties of metal cables as manufactured, not associated with aging. There are also metal cables made from wire drawn in a different process that don't exhibit the internal "cystalline boundary" characteristics vdH is referring to, known as Ohno continuous-casting (OCC, not to be confused with Orange County Choppers). In any event, the vdH carbon cables don't have these boundaries, which is the point they're trying to illustrate by way of comparison. VdH also asserts that their so-called Linear Structured Carbon (LSC) can neither oxidize over time nor be microscopically stressed or damaged by being sharply bent or repeatedly flexed.
How much any of this really means for home audio is highly debatable, but I do think The First Ultimate non-metal interconnect is an extremely high-fidelity set of wires when used in appropriate applications (it won't work in every system, for reasons we needn't go into here). VdH also makes cables where the metal wires are coated with a protective layer of conductive LSC (construction they label Hybrid), which is claimed to help mitigate the scenario noted by Greeni from the Audience website.
BTW, I've experienced the deterioration in both sound and flexibility correlated with copper oxidation in cheap clear-jacket cord used as speaker cable, but it took over 15 years to become objectionable under the prevalent conditions, and I wouldn't expect this to be a serious problem for typical audiophile-grade cables in most environments.
