Re: Doubly unusable if he moved the document
I chose to use LaTeX, the first one written straight in LaTeX, and the second one via Emacs in org-mode. And yes, the correction/edition process was painful. They want to use Word, I certainly don't.
Oh yeah. I've been there (except I use LyX as my main LaTeX editor, with some editing in vim) too.
Fortunately my MA thesis - the longest thing I've yet written in LaTeX - was deposited as PDF so there wasn't any back-and-forth with Word. The Graduate School would just send me a list of formatting changes that needed to be made,1 and let me worry about adjusting the LaTeX.
One of the nice things about submitting to e.g. ACM journals is that they all use LaTeX as their submission format. That seems to be pretty widely true in the sciences. The humanities are mostly stuck on Word.
1In time-honored tradition, these would be things like "bottom margin on title page is 1.1 inches, must be exactly 1 inch".