The difference between this and Munich's attempt is that France has been building up gradually. They already run Tchap (Matrix-based) for government messaging, and the gendarmerie switched to Linux years ago with over 70k desktops. Munich tried a big-bang migration without enough internal expertise and caved under political pressure when MS moved their HQ there. Schleswig-Holstein in Germany is taking the same incremental approach now and seeing better results. The pattern is pretty clear: governments that treat it as a multi-year capability build succeed, those that treat it as a licensing swap don't.