I don't usually advocate "cloud" solutions but...
Run a pure ipv6 setup internally, and let someone else deal with ipv6 to ipv4 translation. Eg: Cloudflare, but only give them an AAAA record. You can safely forget ipv4 exists.
Run a pure ipv6 setup internally, and let someone else deal with ipv6 to ipv4 translation. Eg: Cloudflare, but only give them an AAAA record. You can safely forget ipv4 exists.