But if they thought that btrfs was the future, they would definitely have put in the manpower to maintain and backport btrfs. Red Hat probably believes that XFS + LVM et al. can provide the necessary functionality for enterprise setups on a more reliable basis.
They were never heavily invested in btrfs and they simply already employ a lot of XFS developers. I also don't think it's that easy to put more manpower into it. People with expertise in such such a rather complex niche field don't grow on trees.
