I just had an interesting thought about planned obsolescence.
In college (Mechanical Engineering) I took a course called "Design for Manufacturing." It was all about getting us engineers to think beyond the basic calculations, and consider the bigger picture as well. Things like making sure the products we design are possible to manufacture, keep in mind that the needs of the company may outweigh making the perfect design, etc. One day the professor started talking about this old TV he had in his garage. How he had bought it 30 years ago and it still worked so he kept it in his garage, and used it as background noise or to watch the news while he was working on projects out there. I loved this story because, to me, that represented a well made product that was clearly designed with quality, reliability, and the customer in general in mind. He then proceeded to say that it was a poorly designed product because it lasted too long. If it had been designed better it would have broken, he'd have had to go buy another TV, and the company would have made more money off of him. As you no doubt believe after reading my initial reaction, this horrified me. I'm supposed to make shoddy shit so a company can fleece it's customer's for more money, rather than focusing on doing high quality work and basing a business on that reputation? UUUUUUGGGGGGG.
Just now, having read your post, I'm second guessing that thought a little bit. I'm still avidly anti-"Screw your customer in an attempt to increase profit margins", but I am thinking about whether or not designing every product to be as reliable as possible is really the best choice. Does everybody want to keep a TV for 30 years? No. How many people would be happy to have a black and white CRT TV when there are newer, flashier options with better resolution and features like (Gasp!) color? Probably not many. That TV was designed to last much longer than the average person would want it. And I'm willing to bet that the higher quality design, materials, and manufacturing cost more. Then many people paid money for a TV that would last longer than they wanted. Wouldn't the optimal thing, for the customer, be to make a TV that lasted about as long as they would want and reduce the price to match the lower quality? Yes, of course, trying to predict precisely how long somebody is going to want a product and precisely how long a given design will last is a fool's errand, but I'm enjoying the philosophical questions here. Would that count as planned obsolescence? If it's planned obsolescence that is intended to be beneficial to the customer, is that a good thing instead of a bad thing?