ODF vs OOXML is not the only example.
In 1998, following the submission of VML and PGML (both vector graphics formats using XML) to W3C, a new standards working group was created, SVG, to take the best of both for the Web. Microsoft decided not to join largely because SVG used so much PGML & promoted VML in its products, implementing it in Internet Explorer and Office so SVG would suffocate and die.
24 years later, Microsoft has deprecated VML and fully implemented SVG.