I think if I had to use type-writer mode, or Write or Die, in order to write then I'd give up and find another hobby. Writing's something I do because I want to, not because I want yet more deadlines to meet, and that means getting involved in what I'm writing. When it's going well I have still managed to produce a reasonable volume over relative short times even using my continuous rewrite approach.
I've never used Dragon (I do have an old copy around here that came with WordPerfect, but I never installed it), though I do remember back when I was using OS/2 and tried it's voice feature. I was most disgusted when my computer would willingly obey one of my friends but mostly ignored me! Needless to say I told it where to go.