The cost of an IPv6 address is effectively $0. The cost of a static IPv4 address is ~$90 last I checked. And while network providers can provide dynamic IP add

The cost of an IPv6 address is effectively $0. The cost of a static IPv4 address is ~$90 last I checked. And while network providers can provide dynamic IP addresses, it's pretty trivial for them to provide static addresses and just never bother changing them - it's not like there's a shortage of IPv6 addresses. So from the perspective of a home internet user, acquiring a static IPv4 address is harder and more-expensive-than-$0.