Consider Security First

"As with many rolling-release systems, you can’t automate the installation of these security patches with FreeBSD because it is not safe to blindly update packages."

For what it's worth, I've been automatically installing Archlinux updates for a while now. I have monitoring for things that I care about, and every now and again I find out that I need a monitor for something I didn't realize I cared about.

It certainly requires more attention than something like Debian/Ubuntu where they're backporting security fixes, but it also means there's one fewer layer where somebody has to correctly align the stars to patch a vuln.