Something to consider about those statistics is that they don't include mainland China's massive IPv6 adoption, because the great firewall of China isn't going

Something to consider about those statistics is that they don't include mainland China's massive IPv6 adoption, because the great firewall of China isn't going to "just" let you use Google. The Chinese government is actively pushing ISPs to deploy IPv6 to the point where [it's banning IPv4 NAT devices starting next year](https://www.lightreading.com/regulatory-politics/china-directs-telcos-again-to-speed-up-ipv6-adoption https://www.lightreading.com/regulatory-politics/china-direc...). If you do see traffic from mainland China, it'll probably be through a VPN, and VPNs tend to be IPv4-only. Most companies and servers probably won't care about Chinese visitors, but that still comes down to 763 million internet users that don't show up in the IPv6 statistics for companies like Google.