We're talking about bleeding edge features that were just created, and yes they're often modeled upstream in Illumos. However, there are other features that hav

We're talking about bleeding edge features that were just created, and yes they're often modeled upstream in Illumos. However, there are other features that have been created by companies using FreeBSD first. But they tend to get pushed up to OpenZFS first and then trickle back down to vanilla FreeBSD. When it comes to stability and performance FreeBSD == Illumos. I wouldn't worry so much about features anymore, because as soon as they're available they get pulled in. Last I looked the awesome ZFS features that are coming still weren't fully accepted upstream yet.