Two FOSDEM talks on Samba 4

> But Samba 4, as it ships with some modern server distributions, does not quite reflect this reality.

FWIW, Ubuntu 18.04 LTS will ship with 4.7; 4.7.4 is pretty recent* and is the currently packaged version: https://launchpad.net/ubuntu/bionic/+source/samba

It's a main package, which means it'll receive security updates for the lifetime of 18.04 LTS.

[*] 4.7.5 is the latest in https://download.samba.org/pub/samba/