In 2003, Munich announced it would be moving some 14,000 PCs off Windows and to Linux. In 2013, the LiMux project finished, but high associated costs and user dissatisfaction resulted in Munich announcing in 2017 that it would spend the next three years reverting back to Windows.
Hope it goes better than in Münich, though
Indeed, hopefully Microsoft won’t attempt to sabotage the project again: https://techrights.org/o/2021/11/23/misinformation-about-munich/.