One born every minute
There's at least some plausible basis for fancy audio cables for analog connections, where noise or interference can affect the output. (Whether or not that effect is noticeable or not is beside the point.) Once things are digitized, though, all the ridiculously expensive materials become irrelevant; as long as it still resolves to the same sequence of 1s and 0s, it doesn't matter how much noise there is in the signal.