https://www.theregister.co.uk/2018/07/27/lower_saxony_to_dump_linux/

The German state of Lower Saxony plans to follow Munich's example, and migrate a reported 13,000 users from Linux back to Windows.

Apparently undaunted by the cost of the Munich switch (which we reported in January could be as much as €100m), Lower Saxony is considering making the change in its tax office. The state seems to expect a much cheaper transition, with Heise (in German here) reporting the first-year budget is €5.9m, and another €7m further out.