But what is your point, the MSis good and people forcing interoperability are bad? Google Docs and other open source tools can import docx and this is great

But what is your point, the MSis good and people forcing interoperability are bad? Google Docs and other open source tools can import docx and this is great even if not perfect, and if there is an issue you can read the code of the document and maybe figure the problem, is Infinity times better then the old ways where Word would probably just binary serialize the data and dump it in a file. We are talking about giants having to interoperate with others, what is your point? It can't be done perfectly because giants are evil and we should not try?