[throwaway2048]

The advantage of ipv6 for consumers is that many ISPs (especially non american ISPs) don't and can't hand out public IPv4 addresses, due to the lack of remaining IPv4 addresses for them to allocate.

The choice isn't between every device being globally routable (which is easily solved by a firewall WITHOUT NAT) and a single routable address, the choice is between zero public routable addresses, and as many as you need.

[tialaramex]

[The parent edited their post to render my comment wrong]

[treysis]

He didn't say "all", he said "many". And that is factually right. Many ISPs use DSLite/CGNAT and don't hand out public IPv4 addresses to their customers anymore. Yes, some offer the option to change to a public IPv4, some charge extra money for this feature, and some don't offer it at all!

E.g. my ISP doesn't hand out public IPv4 and you can't order it, unless you change to a business contract. However, my ISP is doing some weird 1:1-NAT, so while I don't get assigned a public IPv4 to my router, I do get assigned a single IPv4 on the CGNAT router that also translates back to my home network.

[oarsinsync]

> However, my ISP is doing some weird 1:1-NAT

It's probably a 1:Many NAT, where the external IP you see yourself as coming from, is used by many customers, not just you.

Otherwise there's no upside to deploying the additional overhead and cost of CGN devices for the carrier.

[throwaway2048]

I also have a non American ISP, and they will not give me a public IPv4 address, for any amount of money.