That's a different point than the one I was addressing, which was that warranties can be taken as indicators of how long products can be expected to last. What

That's a different point than the one I was addressing, which was that warranties can be taken as indicators of how long products can be expected to last. What products that have extended warranties usually have in common is that they are expensive and represent significant investments for the average buyer. If you buy a car, a fridge, a washing machines, etc, you want a guarantee that you will be able to amortise that investment over as long a time as possible.