Hi Alessio,
The question I asked myself was “if I was to use NethServer to run all my core services for a network of say 25 - 200 users (most of which would be Windows based) what feature would I want that currenlty isn’t in NethServer?”
The only one that jump out at me was a way of deploying Windows based group policies.
Being able to deploy group policy would take away the majority of the burden surrounding supporting Windows clients.
You could then take the average default stack of network services and replace them with NethServer and the clients wouldn’t even notice (DNS, DHCP, File and Print, Firewall, VPN, Backup, Proxy, Group policy) and to a large degree email.
I hope this helps 