- A DE safety razor is, indeed, cheaper than cartridge shaving: $40 will get you a good Merkur 34c and a 100 pack of Astra blades. A Gillette Mach 3 and 100 blads is about $140.
- Some people who shave with a DE tend to spend the money they saved on other shave gear: a nice brush, some fancy shave soaps and aftershaves. If you make it into a hobby you can spend a LOT of money on gear.
- If you've been shaving with a cartridge your whole life, learning to shave with a DE can take time to learn. It legitimately took me 5 years to get really good and I still sometimes cut myself and fall back on a cartridge for certain tough spots under my jawline where the pivoting head comes in handy.
- Dollar Shave Club and Harry's really are a great way to save money on shaving. Ideally that will continue even with both being owned by big corporations now.
- It's sometimes pointed out that (in the past, at least, cannot confirm this is still true) Dollar Shave Co. is just reselling handles and blades made by a company called Dorco. While true, it turns out that buying the DSC-branded gear is actually cheaper in most cases than buying it straight from Dorco, unless you buy a lot at a time.