On the other hand, HN is full of people who a) type all day for a living and b) enjoy tech history and quirky things.

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.