To be honest, FreeBSD lack so many other modern features that barely makes it usable. (Properly working)NUMA? Virtualization? Yes, I'm fully aware about work in progress.
FreeBSD supports being run as Xen dom0, has OS-level virtualization through jails, the bhyve hypervisor and can run as a VirtualBox host. I'm thus not sure what you mean by a lack of virtualization.
Touché on NUMA. How this makes FreeBSD "barely usable" is beyond me.
And yet Netflix chose FreeBSD over Linux to serve about 40% of all internet traffic, as does WhatsApp.
Since when Netflix accounts for 40% of internet traffic?
Netflix video accounts for over 40% of all internet traffic, yes.
See for example http://time.com/3901378/netflix-internet-traffic/ Note that the metric is actually downstream peak time consumer ISP traffic which is a little different than "40% of the Internet," but the fact remains that Netflix is using FreeBSD to serve a phenomenal amount of traffic.
If you think someone may be saying something ridiculous, please reread carefully in a charitable manner (charity was not even required here).