> But there is like gazillion tunneling etc options for people whose isp doesn't provide IPv6 Last I looked, a lot of these either require a public IP address

> But there is like gazillion tunneling etc options for people whose isp doesn't provide IPv6 Last I looked, a lot of these either require a public IP address (do not work behind CGNAT), are defunct (not accepting new registrations, or even have a parked domain), or no longer work as well as they used to (both 6to4 and Teredo depend on public anycast relays, and their connectivity seem to have gotten worse; and Teredo also requires that the native IPv6 hosts do not filter ICMPv6 Echo Requests and Echo Replies, which unfortunately are too commonly filtered by overzealous sysadmins).