Just looking at the server count, there appears to be merit in enabling the use of IPv6 on another of the entries. Or maybe not. I will have to do some digging. Right now if everyone was on IPv6 I assume the clients would all prioritize IPv6 for each of the numeric entries, meaning that right now they’d talk to IPv6 servers 25% of the time. Adding one more AAAA record would bring that up to a 50/50 split.
IPv4 IPv6
Africa 37 16
Asia 177 90
Europe 1680 982
North America 632 302
South America 45 12
Oceania 92 36
Global 2660 1426