> I believe the first version of this required the metadata to be stored on the ZeroFS server, making HA kinda hard.

Metadata has always been in the bucket itself.

For HA, there's now a "replicated mode" if you want automatic failover:

https://www.zerofs.net/docs/high-availability

The HA certainly makes this more of an alternative to JuiceFS now.

Would need something like HAProxy to correctly handle failover for NFS though?