You mean IPv6 != No Firewall. Firewall are going to cause pretty much the same problems as NAT.
Re:IAB Statement on IPv6
by proactivesvcs on Tuesday November 08, 2016 @09:20AM
(#12900379)
Quite. But there's no need, nor excuse for NAT on IPv6.
Re:IAB Statement on IPv6
by CountSessine on Tuesday November 08, 2016 @10:30PM
(#12905861)
True, but that's just kind of dumb.
Example: Verizon Wireless.