[ipv6-wg] IPv4 sharing ratio (for IPv6-only deployments)

Hello, I was (off-line) watching Richard Patterson's presentation about Sky UK's MAP-T deployment. By the way, this is the kind of presentations we should be seeing more of in RIPE meetings. So anyway, I was taken aback by the IPv4 sharing ratio and I had to do a double take. Richard mentioned that they're using 1:16 in Italy and 1:8 in the UK. In a similar size deployment in Greece (in my previous employer), a few years ago, we had decided on 1:64 (~1000 ports per subscriber) and I'm now wondering if it is outdated or not. Cheers, Yannis