> Hyrum's law. That's how IPv4 is being used in practice.

It's still very ugly to mess with the ports that way.

The only clean NAT is 1:1 IP NAT.

> You literally CAN NOT. On Android there's no way to put in a static IPv6 or even use stateful DHCPv6.

Blame the closed and proprietary Android platform for that; not IPv6.

The problem here is the IPv6 design. It has multiple ways of configuration, and ALL of them suck.

Manual address input is clumsy because of IPv6 address length, stateless RA is limited and doesn't allow network introspection, stateless DHCP is pointless, stateful DHCP is not supported by the most widely deployed OS. There's also prefix delegation that needs stateful DHCP.