I do not think they wear out and actually found quite the opposite. My old 850 Reference speaker cables and 350 Reference ic's seemed to sound better over the years and were stellar right up until recently when I replaced them.
Regarding the comments about rolled off freq and smeared sound, I would be very curious to know which cable exactly, and with what gear because that is so very opposite of my experience. I have yet to find a cable that comes close to the clarity, accuracy, dynamics and overall "you are there" experience than MIT. They transformed my system way beyond my expectations and each cable has been more like a component change than a cable change. I can appreciate some may not be willing to make that type of investment in cable components but I cannot understand denying their efficacy.
Regarding the comments about rolled off freq and smeared sound, I would be very curious to know which cable exactly, and with what gear because that is so very opposite of my experience. I have yet to find a cable that comes close to the clarity, accuracy, dynamics and overall "you are there" experience than MIT. They transformed my system way beyond my expectations and each cable has been more like a component change than a cable change. I can appreciate some may not be willing to make that type of investment in cable components but I cannot understand denying their efficacy.