Why no “Break in” period?


If people say there’s a break in period for everything from Amps to cartridges to cables to basically everything... why is it with new power conditioners that people say they immediately notice “the floor drop away” etc.  Why no break in on that?

I’m not trying to be snarky - I’m genuinely asking.
tochsii
The "break in period" is usually one day longer than the return window. 
Physically moving items such as speaker cones and cartridges I'd agree have a break in, cables? Not in my book. 
Oh, one thing I should add, because it's late Sunday and the trolling has been mediocre all week:
I've never heard cables "break in."

When I hear differences they pretty much have to do with the cable, not with how long they were in the system or how new they were.

Best,
E
Any thread that works in a  reference to Uma Thurman is a thread I am going to follow...

~S~
Time heals all wounds.
People forgive, but they don't forget.  There are times when they don't forgive either.  

Any thread that works in a reference to Uma Thurman is a thread I am going to follow..
Didn't see any.  .