I’m 32 years old and have never used a typewriter in my life. So I’d imagine the majority of HN users haven’t either.
I'm 31 and have used at least 2 typewriters in my life - obviously at no point did I need to for either school or work, but there's something romantic about them and I often fantasise about getting one to write with... though I'm fairly sure it would end up gathering dust as a (possibly pretentious-seeming) ornament in the corner of the room, so I avoid the impulse to buy one.
Just the idea of a portable. Almost but not quite like a portable piano in my mind.