They’re definitely cheaper than using cartridge razors, but personally I found decent cartridge razors just get a closer shave than safety razors. And it wasn’t for failing to learn how to use a safety razor either. I used one for several years, got good at it, but later switched back to cartridge razors on a whim and found that they simply get reliably closer shave than a single blade does. I still use soap and a brush rather than canned shaving cream, because it is much better and more economical, but for me the closer shave that comes with a cartridge razor is worth the price.