I am a big fan of plain text documents. Where I work we have a tool that collects requirements and then they can all be exported into Word. The problem is that the tool takes these one and two line sentences and produces a document out of them. In between each blurb there is about 3-5 lines of redundant boiler plate about who wrote the two lines of text and when. It is almost unreadable in that form. Things like keeping a consistent verb tense/voice go out the window.
When I come on to a new project I like to see a well written document that has an introduction and several well written pages. I can read that and get the rest from the code.
The issue is that we don't need expensive tools to write text files.