You know that glorious feeling of a first shave with fresh blades? That is something to keep up on, the recommendation being new blades each week. When blades begin to dull it becomes a safety hazard for your skin because, among the obvious reasons, you’re more likely to cut yourself from instinctively pressing down for as close of a shave as a fresh blade gives. The smooth shave of new blades is not something you can only experience between disgusting over-used blades. You can have it every day! Imagine the world your would live in: fewer nicks, consistently smooth skin, and no more gross razor heads.
In my line of work we’re given two box cutters to use and they stressed the importance of getting a new blade as soon as you feel resistance because the risk of an accident happening gets greater as the blade gets duller. A person is likelier to yank on the box cutter if it hitches on what they’re cutting and do some serious damage. It’s easier, faster, and safer to cut with sharp blades, and it’s about working smarter, not harder.
Going over the same spots with a dulling blade will irritate your skin, regardless of the cream you use, and take more time than really necessary. Work smarter, not harder. It seemed like a luxury to me at first, but after signing up for a blade delivery service with their “girlfriend-friendly” shaver, I’ve really noticed a difference time-wise and it doesn’t seem like such a chore anymore. I had this epiphany of “THIS ought to be the norm.” Honestly, it’s a good habit to get into and it costs $4-$8 a month, depending who you go through, the equivalent to two good beers or one really good beer. I can spare that for grooming maintenance.
Much like car air conditioning, while you can live without it like the human race did for years before its availability, you’re not doing yourself any favors by abstaining if you don’t have to.