@njs Yeah, that's accurate. I use orgmode heavily, but almost exclusively for project management. I used to use it for journaling, but hostile work computer and poor mobile support mean that it's not available to me enough.
Think the cautionary tale only applies to using it for literate programming.
@jfm for small documents, definitely. There are lots of kinds of documents where you hit its limits though, and need something with more head room like org-mode or ReST.
Though also, a cautionary tale: https://mobile.twitter.com/lvh/status/818228932113821696