| We would have to rewrite our entire application to support it |
There's no certification track |
I don't want to expose my MAC address |
Too many people have broken IPv6 stacks |
| Vendor bugs |
Android doesn't support DHCPv6 |
IPv6 is a security risk |
Our business intelligence team can't even parse IPv4 logfiles |
| None of our customers want it |
Our recursive DNS can't handle the extra load |
Azure doesn't support it |
It's not supported by Google Compute |
| What do you mean I have to wrap an IP in square brackets? |
It'll make it easier for the government to track me |
We can use RFC6598 |
AWS doesn't support it |
Made with excuses from 
IPv6 Excuse Bingo