FreeBSD vs other for web hosting

My first priority would be security. Then longevity. Then ease of use.
So... FreeBSD?
  • Security - jails - check
  • Longevity - use RELEASE and don't upgrade just for the sake of it - check
  • Ease of use - Unless you consider dealing with systemd and whatever firewall your chosen Linux distro uses to be 'ease of use.
The owner of said datacenter probably assumes:
"number of people using it" == "is good"