World map:
https://www.arcep.fr/cartes-et-donnees/nos-cartes/ipv6/carte...
France is extremely close to 100%:
https://www.arcep.fr/fileadmin/reprise/observatoire/ipv6/Arc...
> some countries with high v6 deployments see services which are v6 only.
IIRC this has already long happened in some countries with smaller IPv4 pools, can't recall where.