The answer is, sadly, still more political than technical.

Munich moved to Linux in 2004 and was mostly complete by 2013.

Then Microsoft turned up the charm, and moved its headquarters in Germany to Munich, and Munich decided in 2017 to switch back to Windows by 2020: https://fsfe.org/news/2017/news-20170301-01.html

But then different politicians were elected, and in 2020 it decided to switch back to Linux again: https://linux.slashdot.org/story/20/05/23/238252/munich-says...

Munich story is one failure among many successes.

Ever heard of GendBuntu? [1]

Probably not, because it was a successful migration.

https://en.m.wikipedia.org/wiki/GendBuntu

I find it puzzling they use OpenOffice instead of LibreOffice.

The project started 6 years before the LibreOffice fork existed.

Yes, but it's been left in the dust since the devs left to fork it as LibreOffice.

Ha, can a city run with a dual-booting system? /s