You can use certainly v4 for however long you like, but you still need to use v6 as well, because you can't connect to v6 addresses using v4. (If you could, we

You can use certainly v4 for however long you like, but you still need to use v6 as well, because you can't connect to v6 addresses using v4. (If you could, we wouldn't need v6 in the first place.) If you want to avoid v6 altogether, you can use a proxy on the machine you're currently calling your router, and configure all of your programs to use the proxy. But... nobody wants to use proxies.