I am not talking about a OS for the general public, but specifically for the administration.
And this will work much better with a unified attempt. If the EU would be taking OpenSuse for this, this would basically be the end of OpenSuses independence... I'd like it to be GNU/Linux based though.
There were grassroots movements like the Limux project (Munich using a custom Linux distribution). But that got shut down by Microsoft bribery (not confirmed, but MS did build a new headquarters in Munich...).
Yeah, that was a shame. But I really think we'd need a shared OS for all administration units of the EU (from EU level down to munipiality levels). Would be much easier as the private sector could also adjust to it.