Second that, even though it seems that there is nothing happening yet, many companies and government agencies in all of Europe are aware of their hard Microsoft dependency and are looking / coordinating to leave.

Same with Atlassian Confluence / Jira.

(Source: Working in a state owend company in a EU member country)

Everyone in the American IT world has been trying to leave Microsoft and Google for decades. In that case, the problem isn't IT push, it's that users refuse to learn new software. I can guess it's the same in Europe.

It's maybe harder in Europe, because you also have fragmentation. For example, Californians are fine using software from New York. Same, same. But Germany prefers to use German software, so far. This makes it even harder, I would guess, for EU developers to establish a thriving standard.