Isn't that sort of an issue with LibreOffice today though? At least in the sense that there are features in for example Microsoft Word where, if you use them in a document, and then open that document in LibreOffice Writer, it won't render correctly/won't function? I struggle to give you an example because it was a along time since I tried to do that, but I have definitely run into some compatibility issues there, on the side of LibreOffice. Maybe you're referring to something else though?

Edit: Nvm, I'm mixing up OnlyOffice with OpenOffice. Never used OpenOffice, don't even know what it is.