GitHub Workflow and Legal Drafting

On Slaw, and in any post on the Internet that talks about Git and legal content, the fact that some legal document has been posted on GitHub is seen as an indication that somebody is trying to make things more transparent or collaborative, or just trying to bring the law closer to technology.
I think we have yet to see the real impact of software-like version control and collaboration in the actual practice of law and in the legal publishing world.