| We have IPv6, but we just want to keep things simple |
Android doesn't support DHCPv6 |
IPv6 addresses are too long to remember |
It's not supported by Google Compute |
| It's too complicated |
Our Lawful Intercept doesn't support IPv6 yet |
Azure doesn't support it |
NAT444 is fine |
| We don't have a lab to test it |
IPv6 just isn't a priority |
No one else has deployed it |
Larger headers are less efficient |
| AWS doesn't support it |
There's no certification track |
Vendor bugs |
We don't need that many addresses |
Made with excuses from 
IPv6 Excuse Bingo