Shortly before the official announcement of the end of LiMux, Microsoft's German headquarter moved to Munich [1]. It's also estimated to cost about 89 million € to return back to Windows [2 (german)], including 24 million € for "external consulting".
1: https://mspoweruser.com/microsoft-germany-moves-into-a-new-h...
2: https://www.heise.de/ct/ausgabe/2017-26-Muenchens-Rueckfall-...