Static IPv4 addresses are closer to around 5% of customers. Nobody asks for IPv4, but some customers bring their existing or own wireless routers along and occasionally choose devices that are not IPv6 capable. Maybe in another 10 years those devices will finally be fully removed from service. The worst stragglers right now are the old combo DSL modems that effectively have no modern replacements -- it's just not worth spending money to replace them when customers are going to migrate to fibre soon enough.
I don't think GP meant static addressing but literally, how many ask for IPv4 service? None, because you just provide it; it's an unstated expectation.
Now apply that to IPv6 and you can see the point that (I think) GP is making.
Side note: The claim it is not widely used doesn't track. How many people use Google or Facebook? More than half of that traffic is over IPv6.
I know that the GP wasn't asking about static IP addresses, however I was merely providing some statistics about what customer asks regarding IP addresses are actually seen on the provider side of things.
It's not widely used in my customer base as well as among a number of other small independent ISPs I know of. A significant number of the CPE we have deployed today do not support IPv6, therefore a significant number of our end users will not be using IPv6 resulting in only partial usage. That is what I am referring to: an incomplete deployment of IPv6 across a customer base without their knowledge of change and the end user's ability to identify issues will cause support issues which costs money and time.
Because of how IPv6 is provisioned, going from a no IPv6-deployed state to fully-deployed state will encounter transition issues. It's not provisioned the same way as IPv4, and that's the whole bloody problem!!! Sure, I can turn on handing out IPv6 addresses from our edge routers via PPPoE today, but it's not going to "Just Work" for all customers without CPE config changes (assuming the CPE even supports IPv6 in the first place for which a bunch of them do not!). It's a complete pain that has less than zero benefit for a small provider today since everything is available over IPv4 and nothing is IPv6 only. Heck, another ISP I know had a customer ask for IPv6 support, and then the customer didn't even bother to provision it on their own router!
Another example: take Ubiquiti's AirCube product line. It doesn't support IPv6. To deploy IPv6 it would be necessary to reconfigure things to make the ONU for the customer act as the router for the customer's home network and place the AirCube in bridged mode. That's assuming that the ONU even supports IPv6 yet as it did not when I looked into it on the order of 6 years ago. And yes, there are a few dozen customers on AirCubes that fall under this case. This means moving into a territory where multiple different CPE deployment configs are now required for less than zero benefit.
That there are gaps in IPv6 support has been a problem, is a problem, and will continue to be a problem. The industry isn't 100% IPv6, and I don't see how that is going to be the case in the next 5 years or even the next 10 years. Consumer gear isn't there yet. That was the problem 5 years ago, that was the problem 10 years ago, that was the problem 15 years, and that was the problem 20 years ago... What's different today that's any different than yesterday?
It's easy to deploy IPv6 in data centers where you control all the infrastructure on servers where operating system IPv6 support was mature decades ago. It's not so easy as a small ISP when dealing with pile of random consumer gear that an ISP's customers bring to the table where IPv6 support remains hit and miss.
So when you said `ask for IPv6` you meant `ask for a static IPv6 prefix` or something else similar to a static IPv4 address? Or is this an apples to oranges comparison?
And then you say `Nobody asks for IPv4` - so nobody asks for IPv4 and 0.5% ask for IPv6?
2 of my customers explicitly asked for IPv6 prefixes. Another ISP had a couple of users actively using IPv6 15 years ago, but it bitrotted and nobody cared enough to ask for it to be fixed. Another user recently asked to be provided with IPv6 (actually, forcefully demanded it rater) and then didn't even bother to enable IPv6 on their router.
So, yeah, I don't see IPv6 being relevant as a small ISP today.
I have had a grand total of one customer ask in almost 10 years. I have the block and announce it but there are so many dangers with implementing it that I am scared to even try yet until we slow down a little.
