Regarding Munich: Three competing IT-Departments! Repeat, three. An own special distribution. They didn’t migrated all applications (either do it or not) and a lot of stuff was always done on Windows. Finally Microsoft moved a headquarter to Munich and solved it with “tax money”.
Rumors say that the reverse migration to Microsoft itself was also “bumpy”. Let me guess, three IT-Departments?
The former major of Munich also gave an interesting interview about the “experience”.