Re: It’s not going to happen
everything is available on IPv4
But it isn't. Most things are on IPv4, but there are some IPv6 only things out there, and over time they will get to be more numerous. At some point you will find that you want to access something that can only be accessed over IPv6, and if you are in the "why bother with IPv6 at all" camp then you'll be disappointed.
At the moment that is a small risk. But there are already hosting outfits that will by default give you a shedload of IPv6 addresses - but charge extra (per address) if you want IPv4. Some ISPs are now waking up to the fact that it's getting more expensive to keep IPv4 going - many will no longer give you a public IP of your own because they don't have enough and they either can't get more or they are too expensive.
And once you are behind CG-NAT then you no longer have the freedom to forward ports as you want. Good luck torrenting or doing anything else that's peer-peer then.
TL;DR version. We're not there yet, but eventually there WILL be something you need IPv6 to access - and it'll be a lot easier and less hassle using real IPv6 than some bastardised workaround to fudge access from your IPv4 address.
Biting the hand that feeds IT
