You want proof that people don't yet trust IPv6? Simply lookup SPF records, very few (like <5%) of domains list IPv6 records in their SPF record, for example Go

You want proof that people don't yet trust IPv6? Simply lookup SPF records, very few (like <5%) of domains list IPv6 records in their SPF record, for example Google and Outlook do, but aol.com/yahoo.com do not. Email is a critical service and the fact most people aren't using IPv6 to deliver email yet is a telling sign. dig -t txt DOMAIN | grep v=spf1 and walk the records and includes for "ip6:...". Good luck finding any.