The inventors who made the first light bulb made it to last. And it lasted and lasted and well..you know there were no more profits from additional sales to the same person. So they went back to the drawing board and came up with :"planned obsolesence". I can't seem to spell that.
That is planned into the design so that future sales are ensured. I just hate this. My microwave hit the end of the warranty and developed a dreadful noise.