This idea of organizations replacing Office and Microsoft comes up over and over again, but in most cases, it just doesn't pan out. The alternatives are 80% there, but that last 20% is the crux of the issue. And the alternatives have been 80% there for decades now. As good as the political reasons are, people get annoyed when you replace things that work well enough and have for quite sometime with something that is in the uncanny valley of office software. It looks similar, it often acts similar, but it really isn't. Remember, I am taking about office workers. People that don't know Slashdot exists. People that have invested a lot in Word and Excel and Outlook (like it or not).
And there's not of a lot of savings there. Per person, you are looking at 60 to 100 dollars a month at the most. Yes, that adds up, but it is easy to lose a few hours a month in productivity dealing with the changes and that savings disappears. Also, you are contracting with Amazon, Azure, Google or (eep) Oracle for storage anyway.
If the EU really wants the US and US companies to pay attention, start building a EU wide government cloud and build alternative infrastructure around that.