Is this actually planned?
What was worrying was that the XFS dataloss was due an action totally out of our hands: a power outage at a substation which took out a whole area of the city. The whole datacentre lost power, and the XFS filesystems on some massive storage arrays were completely hosed. Just from power loss. It took days to put it all back from tape backups. XFS has long been known to have problems with unclean shutdowns, but total loss from a power outage is about as bad as it gets.
These were all on Gentoo, so with relatively recent tools and vanilla kernels.
The only filesystems that I never had problems with were ext4 and reiserfs.
That was exactly the FS that eat my data back in ~2005. Never had problems with XFS or ZFS. With Btrfs well i just use it regularly since 2 years so i cant say much, but i think Redhat chose XFS for a reason.