...amazed by 15+ year old interconnect...

Hello to all...

Wanted to experiment with my stereo - (IMHO) improve the sound , more towards elements I heard from an audiophile friends' system: dug around in my closet and pulled out a 1 meter pair of HARMONIC TECHNOLOGIES PRO-SILWAY MK III (which was part of an equipment buy about 5 years ago), and replaced the Stager Silver interconnects from my Marantz SACD SA-8001 into my JOB INT integrated amp. Let it play low 24 hr/day for 7 days and then for about 21 days (still at 24hr/day) med volume during the day and low overnight - and am now thoroughly amazed at the change (positive in my  estimation) in so many aspects of the musics' presentationthru my system.

This leads me to question who else is using 'older' interconnects and/or speaker cables (meaning 15+ years old) and how they rate in comparison "... to new and of course better constructions and technologies..."

Also: do cables " burn out" or lose their effacicy to perform over time?

Looking forward to real life experiences being shared... Thanks!