I'm looking at it from the perspective of XNU. Most of FreeBSD's interesting and modern features are not in its userland, but in its kernel and/or exposed to th

I'm looking at it from the perspective of XNU. Most of FreeBSD's interesting and modern features are not in its userland, but in its kernel and/or exposed to the userland from there. The BSD parts of XNU are literally decades old, and were lifted before jails were a thing.