It probably wouldn't diff terribly but the markup used in .docx is extremely verbose and not really designed to be human writable the way say markdown is. Most

It probably wouldn't diff terribly but the markup used in .docx is extremely verbose and not really designed to be human writable the way say markdown is. Most users don't see formatting as markup, because as far as they can tell it's WYSIWYG and stored that way. The idea that content and style can even be separate is very foreign for lots of folks, let alone that the representation on disk is text without style.