I think a lot of people unfamiliar with docx think of it as effectively the same thing as any other rich text format. Because of that, they assume converting it to other formats is trivial, not realizing that other formats support a small subset of the functionality docx does.

Definitely. Finance professionals, academic researchers, legislators, among many other professionals, encounter similar version control issues. We are currently focused on law because of our domain expertise and because the problem is particularly pronounced in the law.