It seems they tried to ditch Microsoft Office but to keep docx. What they need to do is to ditch docx first and start using open document format, then let the software follow.

I don’t think that’s very likely as nobody seem to understand what file formats are or why they matter. So the second best option is probably to wait for Euro-Office to hopefully take off, and then hopefully Euro-Office can change default to ODT at some point in the future and we can finally get rid of docx once and for all.