All our internal systems use IPv6. Internal traffic is almost totally IPv6. Traffic to/from the public Internet on our networks is 30-40% IPv6. We just started

All our internal systems use IPv6. Internal traffic is almost totally IPv6. Traffic to/from the public Internet on our networks is 30-40% IPv6. We just started treating it like a first class citizen and worked through the learning experiences, and it quit seeming like such a big deal. IPv6-only, when interfacing with the public internet or the public cloud (which we don't much use), does seem like a challenge, but only due to external factors. It's no more difficult to get a handle on it than any other technology, at which point it pretty much becomes routine.