IPv6 Excuse Bingo| We can use RFC6598 | It's not mature enough | What's IPv6? | IPv6 is slower than IPv4 |
| IPv6 is a security risk | Hex is hard | What do you mean I have to wrap an IP in square brackets? | AWS doesn't support it |
| We have IPv6, but we just want to keep things simple | We've still got plenty of IPv4 | It's too complicated | We don't need that many addresses |
| Android doesn't support DHCPv6 | Our vendor doesn't support it | IPv6 is just a fad | We'll deploy IPv6 right after we deploy DNSSEC |