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

I wonder what they use for Microsoft Office. My office license is renewing in 2 weeks and I have been looking at alternatives but they all have their own catch.

I find Onlyoffice to be the closest alternative. It presents itself as a hosted office platform but you can actually install it locally and it feels just like an office program.

It's not the most efficient, being effectively a webview. But its UI and compatibility is imho much better than LibreOffice.

https://www.onlyoffice.com/