Why no “Break in” period?

Thanx Prof. It is not just sighted biases but intellectual ones also.
Another mistake people frequently make is confusing causation with association. Just because two events happen at the same time does not mean one caused the other even if logic says it does. The media does this all the time. 
When I have a question whether or not something sounds better I try to arrange AB comparisons. I have many switch boxes I have built over the years to test predominantly wires from the listening position. I have one for preamps. Unfortunately it is impossible to do this for break in so we are left with no way to prove and no rational reason why break in should occur with electronic devices. Why doesn't anything sound worse when it breaks in? 

Quote of the Week goes to....

prof

For this gem:

“But let’s be intellectually honest and understand and admit when we aren’t doing so with a "scientific" mindset. And it’s intellectually honest to calibrate our claims and beliefs with the quality of evidence we have.”

That’s gold, Jerry, gold!!

That one was for you, geoff.  Glad you liked it  ;-)

SO; the bottom line of all this discussion(according to some) would be, "It’s a waste of time, trying to upgrade your system/listening pleasure, by actually auditioning(LISTENING), since YOU’RE too inept to tell if there’s an improvement in sound, without a degreed Scientist present, to PROPERLY conduct experiments on your proposed purchase and determine(for you) if it’s POSSIBLE for that component/tweak, to positively affect what you might hear."                                                                                        Right?

rodman99999

SO; the bottom line of all this discussion(according to some) would be, "It’s a waste of time, trying to upgrade your system/listening pleasure, by actually auditioning(LISTENING), since YOU’RE too inept to tell if there’s an improvement in sound, without a degreed Scientist present, to PROPERLY conduct experiments on your proposed purchase and determine(for you) if it’s POSSIBLE for that component/tweak, to positively affect what you might hear."                                                                                       Right?

You're pretty close. Variations of the theme include the insistence that the listener himself conduct various scientific, controlled, double-blind listening tests to suit the sensibilities of the "scientist," and/or the rejoinder that it's fine to proceed without such validation so long as you understand that you are suffering from delusions or any one of a number of other mental maladies.