Comment by cm3

We can speculate on the management decision, but from an engineering point of view Dominic Giampaolo said that he didn't dive into btrfs, ZFS, or HAMMER in order to not get potentially bad influence. At least that's how I read his answer as cited by Adam. It's interesting that Larry (Oracle CEO) being a good friend of the late Steve Jobs didn't result in finding an acceptable ZFS licensing agreement for Apple. I mean, they've incorporated DTrace (into the kernel of all things), so why not ZFS as well?