That is true Roberto. It definitely depends on the product, but I agree that they will all go through the life-cycle. This however can extend over various durations as the product may be difficult to replace or not as susceptible to technological advancements.An example of this is adhesive bandages, band-aids. Though fabrics, adhesives and other components may change they still are the same underlying device. Their decline is unlikely, but may be affected by technological advancements such as the failed liquid bandages.

-Romany