Oh please. It's not engineers who propose non-maintainable products, it's the marketing and business people who make those decisions. Engineers just carry the

Oh please. It's not engineers who propose non-maintainable products, it's the marketing and business people who make those decisions. Engineers just carry them out. As for razors, that's a terrible example. Gillette is famous for the whole "razor and blades" marketing scheme, which obviously was invented by a business person seeking to maximize profit. Disposable razors are a bad idea all around (and they're not recyclable easily; recyclable things don't have metal and plastic merged together so they can't be separated): they perform terribly and are wasteful and cost more over time. The only thing they're good for is if you left your razor at home while traveling. I like old DE razors personally, but even a modern razor is "maintainable": you can replace the cartridge heads. You can't replace the individual blades because there's no feasible way of making a blade assembly that small, with that kind of precision, where an end-user can replace the blades individually, and besides the plastic part of the blade-holder isn't very much plastic anyway. This example is just silly; it's like claiming a car air filter is "unmaintainable" because you can't wash it out, or you can't separate the paper pleats from the plastic frame. That's just dumb. As long as the filter is fairly easily replaceable, it's OK for the filter (a consumable) as a whole to be a disposable product. I am not arguing for things to be made so they can be easily disassembled to their smallest components.