Everything adds up, but I can't really sum up everything in one comment (or maybe I could, but I haven't), and you are not reading all the other comments (at least I don't expect you to). There are factors other than convenience and price, and lately those factors add up so that a double-edged razor is my choice. There are times I use cartridges and there are times I don't. My main critique is that saying "Shaving is too expensive and is a demonstrative example of how most consumer products are designed to extract more money from you rather than to improve your life, or the world, or to be in any way remotely good." is _just_ incorrect.