How would you explain the fact that audio circuits seem to be the only ones that "break in" compared to other industrial equipment? Are audio electrons really all that special? It's easy to throw an opinion out there on a subject, but I wish you would back up your position with some technical facts from direct experience.

Note that I am specifically not talking about electromechanical equipment like speakers, phono cartridges, microphones etc. Things that involve moving parts always wear for better or worse.