Very similar logic applies to the durability too. Being expensive is, usually, a necessary criterion for being "good", whether that means "privacy-friendly" or

Very similar logic applies to the durability too. Being expensive is, usually, a necessary criterion for being "good", whether that means "privacy-friendly" or "durable", but it's not sufficient. Being cheap IS a sufficient criterion for being cheap. If you can prove your expensive, but good product actually lives up to the claim, I might buy it. Ironically, it's an advertising problem.