I'm inclined to think this is, almost entirely, a fake objection - just something people feel they have to claim about LO.
Google Docs is absolutely bloody useless at DOCX reading in every way, and messes up quite simple documents, but nobody ever raises this objection.
LO is really fantastically good at reading the fake standard called DOCX. In my experience, it handles it more consistently than MS Word - which is notoriously incompatible with other versions of itself.
Put it this way: I believe this class of objection when the objector links the LO bug, with a test document.
Google Docs is absolutely bloody useless at DOCX reading in every way, and messes up quite simple documents, but nobody ever raises this objection.
LO is really fantastically good at reading the fake standard called DOCX. In my experience, it handles it more consistently than MS Word - which is notoriously incompatible with other versions of itself.
Put it this way: I believe this class of objection when the objector links the LO bug, with a test document.