Some of us need to use windows for various reasons. There's a bunch of other stuff you can do to prevent spying, they do not fall within the scope of this post.

I'll extend the question: from what does it protect at all? (Answer: nothing, FIDO keys is a hype)

Can you expound on that a bit? It seems like a reasonable solution for a hardware security token. What don't you like about FIDO keys?

From what attack scenario does it protect (there's a few, low possibility) providing real handicap in usability?

I believe pressing on a button not confirming any transaction details/message is quite a useless action

Dont ask this troll, this article is not even about fido.

I'm not a troll, I have an article on this https://sakurity.com/blog/2015/07/18/2fa.html