Back then I read an article about how M$ is crippling the ability of other office packets to read their docx and xslx formats which are supposed to be open formats, but in reality are written in a way never to be fully integrated by competing products. More information about their pseudo open standard: https://fsfe.org/activities/msooxml/msooxml.en.html
Munich in the past have used Linux PCs for quite some time until eventually switching back to windows. Back then they were citing the same incompatibilities to open and read and display M$ office files correctly. So Microsoft is definitely abusing their position as a market leader and trying to cripple competition as much as they can.
There was criticism at the time, but the people who had to work with it every day. welcomed it after a very short time. The end of the Limux project happened all by itself, because Munich's mayor is an MS fan boy and said so openly at the time. It was not because of technical problems or anything else. It was just a huge kindergarten child.
The software etc. continues to run. But as an official project of the state, Limux is dead and so are the subsidies etc. How far it will still be maintained is questionable. However, this does not mean that the topic of Linux and Open Source has become irrelevant. But even now, with the future plans, I strongly assume that something like this will happen again.
But who cares.. But it's only the taxpayer who has to pay for it anyway...
LiMux Client version 6.0 is based on Kubuntu 18, KDE 5.44, GIMP 2.10, LibreOffice 5.2.8, WollMux 18, Google Chrome 80 and Firefox 60 ESR and 68; Okular is used as a PDF viewer instead of Adobe Reader, which was discontinued for Linux.[44] Like the previous versions, it was not multi-session capable. First rollout was done in April 2019 and is estimated to be fully rolled out in 2020.