What a crock of s**tty logic
>> The logic for saying this is that if it was that much better we'd seen far, far more uptake far sooner. Yet most of us sit back watching each other not care.
The two are not related. The reasons for poor takeup are numerous and sometimes complicated, but the key ones are :
1) Some people still won't accept that we actually ran out of address space a long time ago - but we've been employing really horrible and broken cludges (ie NAT) to hide that fact.
2) It does cost money, and many (most ?) ISPs have really screwed themselves over by joining a race to the bottom in terms of revenue. So now their overselling of non-existing bandwidth is catching up, they have no money left for it.
3) There's no (or hardly any) consumer equipment with support for it (see item 2 - the CE (Consumer Electronics) manufacturers don't want to spend any money).
Add them up and you have a classic catch-22 situation. There's "no demand" because it's not there, and the benefits aren't visible to be seen. It;s not there because there's no demand. If only all the wasted effort that's gone into dealing with NAT alone had gone into IPv6 then we'd be a heck of along way further down the road.
As it is, ALL major current OS's support IPv6 out of the box, and even Windows XP supports it. Much of the network infrastructure now actually supports it. Some CE manufacturers are starting to support it. And even some ISPs are dealing with it - my ISP Plusnet is just starting a limited trail of native end user IPv6 having been upgrading their networks over the last few years.
A LOT of software already supports it. I'm fully enabled at home (via a Hurricane Electric tunnel). DNS (BIND) was no problem, mail (Postfix) was just a matter of ... doing nothing as it was already set up and waiting. All I had to do extra was to install and configure IPv6 firewalling (Shorewall6).
For most users there isn't really any specific reason to upgrade right now. BUt before too long there will be - IPv4 is running out, and before too long IPv6 is going to start providing much less hassle than IPv4. As ISPs and CE manufacturers get their backsides into gear, many users will end up with IPv6 without even realising it's on - it'll "just happen".