In other words, you're going to tell Granny she needs to upgrade to Windows 8 and/or replace her CPE because you couldn't get your act together and deploy IPv6 - even though her friends at the bridge club who are customers of your clued competitor didn't have to do a thing.
Or tell her to run "Windows Update" and get the latest update for her existing OS which has the patch.
And then she has to do something *else* 9 months later when you need to deploy IPv6 *anyhow*.
Maybe, maybe not. It depends on how it is deployed. That "something else" might be as simple as "reboot the computer".
I encourage my competitors to design their business plans that way. :)
Considering v4 is likely to be around for another decade or two, getting Class E into general use seems easy enough to do.