The state of Schleswig-Holstein is consistently relying on open source

It's crazy that organizations are willing to spend millions of dollars on Microsoft Office simply because people are used to it. There are literally no features most people actually use that aren't completely duplicated in open source alternatives. Whatever amount of time it takes the user to find the button they're looking for costs less than the permanent subscription cost for something that will only get more bloated and expensive with time.

One thing that is missing that nowadays you get O365 so also management of employees access and licensing in single env.

You get backups, file synchronization, real time collaboration.

Setting and running all of that is as simple as making O365 account and clicking couple of buttons by one person.

There is no OSS solution that does that.

To replicate that with OSS you need 3 to 5 full time graybeards and it still will be annoying normal people that will not understand “why they can’t just do X as in MSFT tools”.