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tell me your experience using zfs/btrfs
(programming.dev)
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Like you say, ext4 is absolutely ancient at this point. I still use it for VMs as it has low overhead and no compression but for bare metal ext4 feels old.
XFS can't really be compared to btrfs or ZFS as it is closer to ext4. If your curious Wikipedia as a table of filesystems and the features they provide. As far as XFS's reliability goes I can't really say as I just use ext4, btrfs or ZFS.