| It's too hard to support |
We don't have a lab to test it |
No one else has deployed it |
Our recursive DNS can't handle the extra load |
| IPv6 isn't an Internet Standard yet |
It'll make it easier for the government to track me |
We don't need that many addresses |
Can't we just buy more IPv4 addresses? |
| Vendor bugs |
IPv6 is a security risk |
IPv6 is just a fad |
Our vendor doesn't support it |
| Github doesn't support IPv6 |
Android doesn't support DHCPv6 |
Our Lawful Intercept doesn't support IPv6 yet |
Our Dynamic DNS doesn't support it |
Made with excuses from 
IPv6 Excuse Bingo