Then have been at it for a while now,

https://en.wikipedia.org/wiki/Red_Flag_Linux

Also maybe EU should start thinking in better supporting SuSE or something like that.

China has been doing this for a while already. Not only porting a country's software on Linux, they are also porting to their own platforms. [1] [2] [3] [4]

Currently it's full of rough edges and barely (if at all) works. But I do believe it's going to happen.

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

[2] https://www.phytium.com.cn/homepage/production/15/ (Chinese-only)

[3] https://en.wikipedia.org/wiki/Sunway_(processor)

[4] https://www.tomshardware.com/pc-components/cpus/huawei-bring...

That is the beauty of web. Most end users now interact via web. They have popular alternative to Office, teams, slack etc.

So even if 40-70% of corporate computers can be moved out it's still big.

A lot Chinese software was created for Windows XP or Win7. Keeping such software running on modern windows can be quite expensive. Many of them do not even have legal windows license.

Add security concerns... What happens if windows activation server goes down? Or Microsoft pushes some hostile patch?

Today, Linux with Wine can be the easiest way to run old windows software.