[yashrk]

Google Docs are incompatible with complex formatting (LibreOffice and even Office365 are too). Moreover, even the Word itself is kinda incompatible with complex formatting: sooner or later one of your collaborators will copy/paste some text with a formatting you will be just unable to change/clear.

Anyway, Word «collaborative» features are so much worse than git repository and pull requests! And even you need to collaborate with some extremely non-technical folks, in the case of LaTeX they still use add comments to the PDF file — and this workflow is still way more productive than editing the same Word document.

Other reasons to not to use Word in collaborative pipelines are already mentioned in neighbor threads.