Do Cables Wear Out?

Oh sure. Yeah. And RAP will just eat right through the cable.

Be careful!

My Yakko cables are so shot that they are turning into dust. All I did was play a little "Too Short."

Technically, he is correct, an example being that automotive spark plug wires in 5,000-30,000 volt circuits should probably be replaced after about 100,000 miles. I wouldn't worry about it in your application for the first 75 years or so however, and I think that is being very conservative. IMO.