[Dylan16807]

An image format mostly stores the end result of what you made.

An office document format is basically source code.

That's why the openness of a graphic format doesn't matter, but clear specifications on how to interpret an office document make an enormous difference.

[pjmlp]

Somehow you missed the point that openness of graphic formats has not helped to make Gimp better than Photoshop, likewise even if Office formats were 100% open, Libre Office features wouldn't match Word.

[Dylan16807]

I didn't miss the point. I'm arguing that the two kinds of format are completely different. A graphics format is a side-effect of the actual editing, an afterthought. With an office document, the format itself is the core of the experience.

[LamaOfRuin]

No, but it would allow LibreOffice to work with them cleanly which was the criticism I replied to (and probably allow Word to break itself less often or have 3-4 fewer implementations embedded in itself).