Furutech GTX NCF receptical break in, how long

What do you think is actually happening during this "burn in" process that would explain the purported sound changes?

Outside audiophile lore, I've never heard any electrician or electrical engineer (who isn't selling high end audio products) say any receptacles need "burn in" for any reason.

So I'm wondering what the actual technical reason would be for this "burn in" phenomenon and why it would alter sound.

(In my own experience, I've never heard a difference whether I've changed the outlets where my equipment was plugged in, including moving to a new dedicated outlet, or whether it's plugged in to my Furman power conditioner/bar). 

^^^ +1  

Ah, the curious, probing mind of the audio skeptic. Why do receptacles need burn in? Why do cables need burn in? Why do fuses need burn in? Why do capacitors need burn in? Why does contact enhancer need burn in? Why, why, why?! Sweet mystery of life. Why do the stars go on shining? Why do the birds go on singing? 🤡

+1 geoffkait!😎

In some cases, length of burn-in time = our ears/brain need longer than usual to get used to the new sound.  Nothing more.