I've been admining Debian boxes for more than a decade so I'm aware of the drawbacks of its policies. That's why my desktop tracks unstable. But for a sysadmin, freezing everything for long periods of time makes for an enormous reduction in churn-related administration time. Having nothing but security updates to install until the next version comes out 2+ years later is excellent. For the exceptions, pinning can often solve the problem. And if pinning doesn't work, there's always building from source.
Like I said above, I'm new to FreeBSD so I'm not sure how much churn I'll have to endure, but I'm looking forward to finding out.