NAT was a thing much before ip addresses became scarse, is a key enabler in the "internets" ease of use as well as the principal ability to connect nearly doubl

NAT was a thing much before ip addresses became scarse, is a key enabler in the "internets" ease of use as well as the principal ability to connect nearly double-digit billions of devices with about 200mio live addresses. the end-to-end principle is mostly undermined by stateful firewalls and a total lack of secure-by-design in software developement, this will not change with ipv6