This new article from Remco van Mook explores an IETF proposal that would allow IPv4 to operate over IPv6-only infrastructure without ARP, IPv4 subnets, tunnelling or translation:

https://labs.ripe.net/author/remco-van-mook/a-farewell-to-arps-ipv4-service-on-ipv6-only-networks/

Comments and feedback are very welcome as always!

Kind regards,
Alun Davies
RIPE Labs Editor
RIPE NCC