I don't know how the change was made from DE to multi-blades, but once it was done, it's pretty easy to maintain. Where I live, I have never seen a DE-razor on the shelf of stores. Some stores have blades, but they're pretty much the same price as cartridges (talk about air in the price).

So when you people start to shave, it's either cartridges or electric, since the hardware or information isn't that readily available. They would need somebody to guide them.