Major sites that aren't cloud providers already supported IPv4 so there's not necessarily a clear incentive to spend lots of money upgrading equipment and rolli

Major sites that aren't cloud providers already supported IPv4 so there's not necessarily a clear incentive to spend lots of money upgrading equipment and rolling out IPv6. Only within the last couple months did AWS announce single stack IPv6 for VPCs (i.e. cloud providers don't have a great IPv6 support story)