alt Hacker NewsIPv6 zones are great. IPv6 neighbor discover is great. Link local doesn’t need SLAAC or DHCPv6 server.
It seems clear that browsers would need to special case this and implement OS specific rules for what a valid Zone ID is.
Browsers have overloaded the URL/search/AI magic bar for years. I don’t quite see how IPv6 Zone ID are that different. They already auto append or auto hide the www subdomain.
Since the zone is is device specific, it doesn't make sense to send it over the wire in html links or a host header, bit it does seem like it could be used in the url bar, at least.