Why manufactures don´t burn in their amps and ...

With all due respect to the tangential discussions above, tje raises an interesting point: Why after paying a phenomenal amount of $ is it incumbent upon the purchaser to perform the break-in? I would think it makes more sense to have this done at the factory level as opposed to a dealer due to warranty ramifcations and the aforementioned stigma associated with buying a "demo'd" unit (versus new) from the dealer.
Couldn't the burn-in serve a dual purpose in terms of flushing out potential defects as well?

The tangential discussions are a reflection of the impacts and unease the buyers are subdued to when purchasing new gear. IMHO, we're still on track here.

OK, the Mrtennis comment goes into the Audiogon Hall of Fame.

"this hobby is so subjective that when you have 2 audiophiles in a room, you will get three opinions."

That's nonsense. You will get four opinions.

The simplest answer is that it's a business, you want all of that done for you, then you are going to pay for it! You aren't getting it for free. Component makers are not cable experts and are not about to squander revenues to research for the best cable for their component. Whether you like it or not, that's your job!