I was looking for such a tool (I use Markdown), but in the end I kept using Git. It turns out it’s also pretty good for non-code content :)

Agreed. But I need non-coder noobs to also use it (i.e., an Editor, fellow writers without dev background).

I suppose I could write them something with big easy buttons that only performs the actions they need.

Git has plenty of open source GUIs that would help.

The main reason that track changes is so horrendous to work with is that MS formatting is a lot more complex that ascii. It does kind of work, if you are strict about the kinds of changes you make and start from a fairly fixed template. Some kind of markdown would be better but even that gives complexity which just isn't there with code.

The Google Docs revision history is pretty nice and a lot easier to work with then either Git or Word.

Also MediaWiki might be another option. Janky though compared to gdocs

Didn't know gdocs had history, thanks for the pointer.

The "suggest changes" mode is also really nice, for multiplayer documents