I’m not sure how you’re trying to define planned obsolescence in order to say it doesn’t happen. Maintenance has costs and it has benefits and a corporation tries the weigh those according to its best guess. But the biggest cost for maintenance as far the decision makers are concerned is not the extra 10 engineers required to support a product with 100M unit volumes for another year. It is the opportunity cost of not selling a new device next year. The fact that the device is not working as long as its usable lifecycle as a conscious matter of corporate planning is pretty much the definition of planned obsolescence. And I can personally vouch that when execs are pressed about why they don’t commit the to longer support terms the answer that comes back is “we want to sell more units next year”.