| Our vendor doesn't support it |
NAT444 is fine |
Hex is hard |
What do you mean I have to wrap an IP in square brackets? |
| My transit provider doesn't support IPv6 |
We forgot to include IPv6 in our last RFP |
AWS doesn't support it |
IPv6 is just a fad |
| We have no roadmap for native IPv6 as we rolled out 6RD. |
Azure doesn't support it |
IPv6 addresses are too long to remember |
It's not supported by Google Compute |
| Our recursive DNS can't handle the extra load |
We don't need that many addresses |
There's no certification track |
We've still got plenty of IPv4 |
Made with excuses from 
IPv6 Excuse Bingo