You can still go online with a 1980's Amiga, send emails, write a novel, etc... Most of which is being talked about here.

Hell you'd be surprised how much you can still do on a old 386 with win 3.1. Pretty much anything word processing was perfected in that era, those old versions of office still work just fine.

While you could write all you wanted with an apple ii, I wouldn't really call that as usable as something like an early version of word which is very familiar for anyone that used word pre ribbon.