Nowadays. Everything are built to break. Often as soon as waranty is ended.
As a business. You do not want to sell something that last forever. That's just bad business.
You just need to build it to last "long enough" to give the consumers a sense that it was justified for X amount of use.
Depending on the areas of technology, the pace of new and better and cheaper tech may differ.
Remember when you bought a Pentium 2 and thought it was fast as hell and would last your forever and ever?







