[lupusreal]

Yeah but the average person wouldn't know to set up a firewall (and can't count on their ISP to have their best interests at heart.) Therefore the general public benefits from the degree of protection that NAT provides.

[Symbiote]

Almost 50% of internet traffic is IPv6.

Obviously, those average people have a suitable firewall provided by default on their routers.

[smw]

I think the vast majority of that is from phones?

[Symbiote]

It will vary by country, but for example all but one of the large broadband ISPs in the UK use IPv6.

[lupusreal]

Do they?

[lxgr]

Then just enable the firewall by default, or don't even provide a way to disable it unless the user enters "developer/advanced/Pro (tm)" mode. None of these are valid excuses for NAT.