Basically a device, or manufacturer is good, if you think you got your money's worth, if it lasts longer, the manufacturer gets a great rep, but looses some of the profits from the next sale, if it doesn't last as long so the customer feels cheated, the company gets a bad rep, and loses customers.
Craftsman hand tools come to mind, they last almost forever, have a lifetime warranty, and even outlasted Sears. i would certainly go out of my way to buy them, but my toolbox has all I need, so unless I lose something, I am not buying. Then there are always new customers, and word of mouth is great advertising.