> and still there's no mechanism for privacy friendly approval for adults apart from sending over the whole ID. Of course this is a huge failure of governments but probably also of W3C

I consider it a huge success of the Internet architects that we were able to create a protocol and online culture resilient for over 3 decades to this legacy meatspace nonsense.

> That being said, this is a 1 bit information, adult in current legislation yes/no.

If that's all it would take to satisfy legislatures forever, and the implementation was left up to the browser (`return 1`) I'd be all for it. Unfortunately the political interests here want way more than that.

SSO and passkeys don't solve adult verification. I don't see how this problem is embarrassing for the www - it's a hard problem in a socially permissible way (eg privacy) that can successfully span cultures and governments. If you feel otherwise, then solutions welcome!