We're migrating many of our servers from Linux to FreeBSD
The key point is not Linux vs FreeBSD.  It is simply choice.  You have a real choice.  Do it this way or that - do it your way.  I like both Linux and FreeBSD but I deploy them differently.I slap Linux on my servers and desktops and I deploy FreeBSD via pfSense on firewalls.Sometimes I do experiments and try out BSD on the desktop which hasn't worked out yet for me but I live in hope because I adore *BSD as much as I do Linux.If BSD is the way to get your servers to do what you want then lovely.  Do it and remember you have choice.