I’ve used ceph (very little) and longhorn for Kubernetes storage. I’ve never really looked into distributed filesystems but could see something with a longhorn or lower level of administrative complexity as something I would use. The replication and fault tolerance would be my primary interest. Some sort of network share on top of the distributed filesystem too, like windows DFS sort of?

Also, again, never looked into distributed filesystems much but if there was a mode where a distributed filesystem could replace syncthing for ensuring a copy of the data was replicated to specific/all machines, that would be interesting. Specifically I’d like to replicate my media share to my laptop so I have it when offline / traveling. I’m all on Linux these days but something like what windows has where you can make a network share available offline and it just caches it to a local directory…. Feels like a distributed FS could do something similar.