Not sure what you mean you can't use the Internet without IPv4. Yes some sites won't work but some sites don't work with https but that doesn't mean you can't use https on the internet
All those sites you mention work with IPv4 just fine. When you shut off IPv4 in favour of IPv6 you shut off access to probably 70% of the Internet. Let's see what happens when you don't enable IPv6? Oh nothing... that's right, the Internet will remain working just fine. There's very little incentive to support IPv6 when all that is required to connect to the Internet is IPv4. Which comes to the fundamental issue with the deployment and transition with IPv6, it will always remain a second class citizen until we no longer need to rely on IPv4.
>it will always remain a second class citizen until we no longer need to rely on IPv4
At $DAYJOB we are already running some services on IPv6 only to save costs, and if our IPv6 connectivity drops people notice it immediately. Is IPv6 still considered a second class citizen when this is the case?
Here's a reminder that "the Internet" is not just Google, Facebook, and Amazon.
