An open letter to office suite users, just before the Euro-Office announcement
(blog.documentfoundation.org)
It's almost as if a suite's capability to open a format is not tied to its default format.
According to the article, Euro-Office defaults to Microsoft's format, instead of .ods, so the whole "sovereignty" argument sure seems to be getting kicked down there road for later, while being used for maximum marketing.
It's just standard corner-cutting hypocrisy.