> Right now, the EU app does not have ZKP functionality, contrasting Ursula von der Leyen’s claim that the app ”is technically ready to be used”. But more importantly, the app is currently designed to always function without ZKP technology; if ZKP is unavailable, the app falls back to a non-ZKP model.

So you have failed the test of pointing at somewhere that has implemented ZKP. You can try again if you like.

> I actually have. Have you? Seems like you haven't read the article. Mullvad is complaining about the fact that the app seems to support both ZKP and identity verification,

Again, this is factually wrong. And it is why people are getting labelled as "authoritarian" - they proposed a system that sounded decent, then they actually implemented something else that is a standard authoritarian ID system with a fig leaf for people to pretend they didn't. As was expected, given that this always looked like an ID card play with a false moustache.

> I tend to disagree with the slippery slope argument

They haven't made it up the hill yet, they're already down the slope. the EU implementation doesn't use ZKP. That's a big part of why they're being included as one of the authoritarian forces in this push that people are upset about.