I grew up in France, where schools don't allow you to use anything else but fountain pens. They don't teach you how to use one - to me, it's always been the same thing as using a ball pen, except you trade the convenience (you have to change the ink cartridge) for practicality (you can erase the ink with special eraser) while keeping some style (it's still ink, not pencil, kept for drawing). Getting a new pen felt we…
As a kid it's kind of fun to get your hands dirty with ink, even fighting with cartridges (pressing them like toothpaste tubes and the like).
Recently I designed a blotter and started selling it on Amazon (Europe) this month; it's a completely niche product but it's selling a little nonetheless, meaning there's some demand for it.