I personally think that it's just fun and “in the spirit” of writing to be pedantic about it and typographically expressive in general. In many ways, writing is a very creative process, because it involves “fixating thoughts”, making something very analogue into something almost (but not completely) discrete; it's akin to graphic design in general in my eyes. And when I can bring some extra flavour to it – by sticking to pedantic rules, using rare typographic marks that have a meaning that's more historical now, or anything else – I tend to do it, even if just for my own amusement.