Not sure how much I should chime in on this one, just saw this post. One of my jobs at my company is "Warranty Manager." I deal with customer returns of our product. We manufacture heat exchangers, example, radiators. We only cover workmanship and material. I guess one advantage I have is that I can look at a warranty and know what they will cover when I purchase something. And I completely understand why. I ask my customers, or dealers, one thing, as long as it is in the warranty period, don't touch it, return it as it is. If someone monkeys with it, that creates a situation where the product is not in its original failed state. I cannot tell what caused the failure, that is bad for me and bad for the customer. I cannot tell if this is something that can effect other customers or an isolated issue. I usually reject it. But past the warranty, its your baby. Do what you want to do. During the warranty period we do not warrant repairs made to our product due to the nature of what we manufacture.
And I think I can understand where they are coming from when it comes to electronics. I would not want to warrant a piece of electronics that some shop down the street places a cheap Chinese board in and it burnt out the whole system. And I also understand the other side as a consumer.
(Cough) Companies usually try to produce a product that will last past the warranty period (Cough)