Replacing MS Office with Libre Office, especially based on comments so far seem to be not that great choice. People not calling support, it might be tu number of reasons. I bet if they did survey on what people think about impact on their work, they would get different results. I was thinking and Google Docs would probably be better choice as alternative to MS, however, this is just another provider ie. you don't get open source.

I am all for open source, and cities like Munich getting into it is welcome news, and will influence improvement in apps, however I suspect there is a lot of negativity pushed under the rug here.