If one country in the UN adopted some new OS, we wouldn't expect every other country (incl the US) to adopt it too.
FWIW, I'm not saying that I would expect the EU to do a better job than the Dutch government. Likely quite the opposite. But it's frustrating as passionate European... that these problems aren't tackled on a union level. You'd think that's their job? The EU will never compete if it stays a loose partnership of 27 countries, and if it can't even get France, Germany, and the Netherlands to work on this together instead of running 3 separate projects...
Two competing products emerge, they are battle tested, opinions form, reviews are conducted. At that point it's a much better time for a significantly larger organisation to create a more focused realistic plan based on learnings and outcomes.
Imagine the analysis paralysis that would set in if the EU tried it from scratch - years of requirements gathering, pilots, reports...
Yeah what could possibly go wrong