"What harm can there be in including BTRFS in their mix of supported file systems, especially at this stage in its development. It definitely smells like a political decision".
I get the impression that they still don't quite technically trust it being the less mature file system plus, and this is the speculation bit, they don't and can't control the development and direction of Btrfs hence the move to using and developing XFS in house.
Biting the hand that feeds IT
