Geez, how did this all go south?

Michael, as always, my question for those who perceive break in as a real property is this: why does it stop when it's perfect? Why doesn't it keep breaking in at the same rate past that point? It makes sense for car engines--bits of metal heating up, grinding off, whatever, but not really for something as simple as a speaker.

I am the Doctor, and THIS... is my SPOON!