How long for an HDMI cable to break in.

@muvluv Thank god. Now we can end this thread you helped make stupider.  

@toddalin 

I just installed an 35 foot 8K cable

Your webpage shows the supplier can go to 100-ft long 8K cables, but all the ones above 35-ft are fibre-optic.  Yours is the longest copper-based one. Makes sense to me.

I could/should have used 30 feet, and it would have been ~$11 cheaper.  But I figured once run through the wall, better a bit too long than too short.  Shouldn’t be a difference in the picture quality so long as it works.

@muvluv 

the charge itself moves at the speed of light the electrons are only a vessel for the electric to travel thru

Every electron carries exactly one negative charge. The "vessel" the electron travels through is typically a metal.

One of the most astounding discoveries in physics is that you don't need a "vessel" for electro-magnetic waves (light) to travel through.

AI:  The Michelson-Morley experiment (1887) by Albert A. Michelson and Edward W. Morley was a famous failed attempt to detect Earth's motion through the hypothetical "luminiferous aether," the supposed medium for light waves.

They discovered that no matter how quickly the earth was moving towards, or from, a light source, the speed of light was identical.  This led Einstein to theorise that there is no absolute time.  Relative to an observer, time slows down for objects that move, especially as they approach the speed of light (which they can never reach).

Electrical signals propagate in much the same way as the sound from your speakers.  Sound is carried by slight changes in the random movements of air molecules, which average out as slight pressure changes on year eardrum.

To you, sound travels at the speed of sound.  But no individual molecule shoots from the speaker to you in a jet stream travelling at Mach 1.  Instead the molecule nudges adjacent molecules, creating pressure waves which do travel at Mach 1.

@toddalin 

Shouldn’t be a difference in the picture quality so long as it works

Exactly.  HDMI cables carrying MDMI signals work until they don't, except for the twilight zone where they mainly work!