There was a joke when Microsoft was pushing Zune that it has the fastest sales growth "in the brown MP3 players market". The category you define may be seen as

There was a joke when Microsoft was pushing Zune that it has the fastest sales growth "in the brown MP3 players market". The category you define may be seen as arbitrary, first because existing filesystems have not stopped evolving. HFS, NTFS and so on have been significantly improved over time, including after 2005. ZFS is a categorically different concept than said examples, in that it's distributed. But the file system has not been shown to be the best (or let alone only) way to have distributed data, you can easily put that at a higher level, and retain the flexibility of defining your own protocol with the consistency, consensus algorithm and other properties you precisely need. Why solve this at the file system and lock yourself to a single system-wide way of doing it, versus have the best solution for each part of the system? I feel like it causes more troubles than it solves.