Git, for the rest of us?

Git is a widely used version control system, much used e.g. by software developers. But others, even writers of one-author paper or book projects,  swear  by it too. Thus Richard Baron writes:

The last time the Open Logic Text was discussed on the Logic Matters blog ( http://www.logicmatters.net/2015/05/10/the-open-logic-text/ ), there was some discussion of the merits of Git, and Richard Zach put up some material on the OLT blog about the use of Git. Since then I have experimented on GitLab, starting from zero knowledge, and can confirm that it is a wonderful system, even for a one-author project. So I encourage everyone to have a go.

This is from the comment thread here, where a discussion continues. This post is simply to point out the exchange to anyone interested in this sort of thing (but who might not be delving into comments on OLT). And to invite anyone else who has views/experiences about Git or some other version control system (as a paper/book author) to share them —  either in that thread, or [better?] in new comments here.