I have sympathy with, and am open-minded to, the conclusions of this article - even as a die-hard, true believer in the filesystem (esp. ZFS) as a useful foundational building block.

However, I hope that these conclusions do not lead to the intentional deprecation of support for filesystems in projects like Ceph. If a non-filesystem backing store is superior, then by all means do it, but I hope the ability to deploy a filesystem-backed endpoint will be retained.

In a pinch, it's very flexible and there are a lot of them lying around ...