Absolutely agreed, the customer's data is paramount, and I think from the perspective of supporting that with their well established in-house expertise, it makes sense.
However, XFS isn't perfect. As I wrote in a separate reply in this thread, my team in a previous position suffered catastrophic dataloss when a power cut took out some massive storage arrays. XFS does not handle power loss gracefully, and in two cases, the whole storage array was unrecoverable and required restoring from tape.
I use ZFS on FreeBSD (and Linux) too, and while it dates back to 2006 and was designed around ~2000, LVM and XFS date back at least a decade prior to that. They are a generation apart, and ZFS builds upon the knowledge of that previous generation, and its successes and its flaws.
Regarding competitive stuff, that's a mystery to me as well. My organisation went with some proprietary IBM storage array kit, but it was a real pain. Required hand compiling kernel modules against the RHEL kernel. And it still resulted in the above dataloss issues.
