Do speaker cables need a burn in period?

mitch2 brought up a good point.  I always thought for the last 20 years that my system was good enough until I added in a new component.  My system now is much better than it was 10years ago, but I still got a long way to go.  When does progress stops?  For example, if someone has a $100K system, can it be better?  How many $100K speakers are there to purchase?  Or $100K amp?  

I still think there are a lot of things that can be done at the recording end such as better audio format, better mixing.  How about coming up with  stereo recordings with surround sound format?  

I knew better not trying to respond to geoffkait directly because you never know when he will turn on you :-)

fortunately all we have to do is burn in our cords and equipment, change some directions, and see if it matters to us...all free,  all easy...maybe even fun for some

Does anyone have a link, or some sort of closely-associated material, where quoted 1937 experiment by Mr. Young could be read about? Google brings mostly this Mr. Feynman's speech, but no actual experiment documentation.