That's not just in Germany. The €3bn Dutch energy company I've worked for was glued together with a shared network drive. It was effectively their poor man's event bus. Pure anarchy, a house of cards of excel sheets and legacy software writing to and consuming from it. Controlling serious infrastructure like the major power plants of the 18th largest economy of the world in 2012 [1]. The result of IT managers who failed to see how the world was changing and came and go, to do things like "agile transformations" instead. I've learned valuable but painful lessons there.

[1]: https://en.wikipedia.org/wiki/Economy_of_the_Netherlands