Two years till it becomes illegal to offer something on IPv4 for the general public and not offer it on IPv6, two more years and no ISP may route IPv4.
Also no ISP NAT bullshit. A default enabled firewall refusing incoming connections is fine, but the internet should be a network of machines that can talk to each other, and for that to happen it must be possible for owners to accept incoming connections, even if it is for nothing more than remote access to their PCs.