[j16sdiz]

I would go further and argue IPv6 zones is a mistake.

I know it solve some real problem. but the cost for solving those is just too high. A careful planning and manual configuration can avoid those.

IPv6 promised a 128bit address space, but we got 128bit + arbitrary length of string instead. This force lots of complication on to application developer.

[notagorn]

I find it obnoxious that HN down votes very reasonable opinions like yours. I think IPv4 has this same problem with multihoming and doesn't try to solve it with a uniform representation but IPv6 had more than enough bits to reserve combinations of interface index and LL address for system use and make the system zero the interface index on send.