I keep seeing references to markdown editors on HN. As a non-tech person it would have never crossed my mind to use something like this to write a novel or even keep notes, but it seems to really strike a chord here. Perhaps it's simply the comfort associated with code over a long period of time?
Part of it might be preference for plain text files with no vendor lock-in.
Or it might be preference for explicitness, we've all fought with rich editors bleeding format from one word into another and struggling to un-format the text at the right location.