IPv6 is a parallel system. It exists with IPv4. You don't need to stop using IPv4 - ever - if you don't want to. You can have both the chicken and egg together

IPv6 is a parallel system. It exists with IPv4. You don't need to stop using IPv4 - ever - if you don't want to. You can have both the chicken and egg together as long as is needed. At some point IPv4 addresses will cost too much.