Re: Ineffective until there are some carrots involved
Not necessarily. With 'always on' connections like ADSL the end user now has, effectively, a static IP address. When a new ISP (or a large growing one) cannot get any more IPv4s allocated they will have to start putting new subscribers on to IPv6 only.
When that happens you may well find that your IPv4 server is not accessible. As that number increases then if you want those clients to access your server you will need to be IPv6 capable.