Firstly, great job in getting that mess to play well with Git! The main limitation with Git is that it only works with plain text (think Windows Notepad). I have seen authors resort to plain text or markdown in order to take advantage of Git, but this means losing all of your rich formatting such as images and fonts. This is usually too much of a sacrifice for companies as formatting needs to be reapplied with each p…
There's a real market here. Word is huge, and people aren't gonna give it up. This looks to be a good technical solution. Trying to move people from word to markdown is an ok ideal, but not a practical business move.
My advice to the creator, ignore bArray's advice.