IPv6 Excuse Bingo| Our Dynamic DNS doesn't support it | End users don't care about IPv6 | IPv6 is slower than IPv4 | IPv6 is a security risk | Too many people have broken IPv6 stacks |
| It's not mature enough | We don't have a lab to test it | Larger headers are less efficient | NAT444 is fine | We can use RFC6598 |
| IPv6 is just a fad | None of our customers want it | |
It'll break our GeoIP | Github doesn't support IPv6 |
| I don't want to expose my MAC address | My transit provider doesn't support IPv6 | What do you mean I have to wrap an IP in square brackets? | It's not supported by Google Compute | IPv6 addresses are too long to remember |
| It'll make it easier for the government to track me | No one else has deployed it | Vendor bugs | IPv6 just isn't a priority | What's IPv6? |