Asklemmy

People still use IPv4 because companies are slow to adopt new technologies. They see it as a huge money drain and if there is not a visible or tangible benefit to it then they won't invest in it. IPv6 is definitely a growing technology, it's just taking it's sweet time. For reference, currently the IPv4 has just under a million routes in the global routing table while IPv6 has ~216K routes. About 5 years ago it was something like 100K for IPv6 and not much has changed for IPv4.

I personally do not like the addressing of IPv6. It's not just the length, but now you have to use colons instead of period to separate the octets which leads to extra key strokes since I have to hold shift to type in a colon. It's a minor thing, but when networking is your bread and butter it adds up.

There are also some other concerns with IPv6. Since IPv6 tries to simplify routing by doing things like getting rid of NATing it also opens us up to more remote attacks. It used to be harder to target a specific user or PC that's behind a NATed IP but now everything is out in the open. I'm sure things will get better as more and more people use it and there will be changes made to the protocol however. It's just the natural evolution of technology.

I am very surprised to hear your ISP is not using IPv6. Seems like they're a little behind the times. Unless they just don't offer it to residential customers, which is still a bit behind the times too I guess.