If the Transparent cables have network boxes, then there is very likely degradation, as the parts they use in the network boxes are shamelessly cheap and can degrade significantly over time.
More generally, if the shielding on IC's or speaker cables is intact and the conductors are not oxidizing, their sound actually tends to improve over time.
More generally, if the shielding on IC's or speaker cables is intact and the conductors are not oxidizing, their sound actually tends to improve over time.