[mironathetin]

If Munichs public service personal has issues with Linux and Libre Office, they need a proper training, not a switch of platforms.

Without training nobody in this world would be able to properly use Microsofts products as well. And this is true for every new version, as the comments correctly mention.

[slowmotiony]

How will training help them if their business applications are not available for Linux?

[mironathetin]

Well, I do expect the availability of applications has been checked before moving to Linux. If not, ... bad management (not impossible that the move was planned badly though).

But if you know exactly what you need, you can also develop software or extend functionality of available software. That's one of the advantages of the Unix processing philosophy and open source software.