CPE

Unlike in the core, where it was about money, at the edges it's mostly about lack of interest. The big ISPs who can order a Taiwanese-built $50 combination DSL modem, Ethernet switch, WiFi access point, Sandwich toaster and Christmas tree decoration in six figure quantities do not care about IPv6. In fact, they don't care about very much. Broken NAT, terrible latency (this is the cerowrt thread, remember?) awful configuration UIs, devices that need rebooting every few days... As a result, the Sandwich toaster / whatever supplied by your new ISP not supporting IPv6 is just one of many ways in which it will likely turn out to suck.

Customers have yet to wise up to this on the whole. The minority who understand that the ISP-provided device sucks will buy a $100-200 device from an electronics store, based on online reviews or personal recommendation. But even most of them don't care about IPv6. So if you're making home network devices it just doesn't make economic sense to prioritise IPv6 support, even if you strongly suspect that every device without IPv6 support will be obsolete in a few years.

If the idiots are queuing up on December 18th to buy 2011 calendars, who are you, as a humble calendar maker, to refuse to sell them and offer only 2012 calendars? The customer is always right, after all.