[ein0p]

ZFS sort of moved inside the NVMe controller - it also checksums and scrubs things all the time, you just don't see it. This does not, however, support multi-device redundant storage, but that is not a concern for Apple - the vast majority of their devices have only one storage device.

[DannyBee]

Everyone seems to focus on the checksumming and scrubbing.

But the real win (at least for me) - every device i have - laptops, desktops, server, even PLC's (they now use freebsd under the covers + ZFS) all backup using zfs snapshots and replication.

I do not ever worry about finding an old file i accidentally deleted. Or restoring a backup to a new machine and "did it really include everything" or anything else.

The machine storing backups is itself replicated to another machine in my detached garage.

If i wanted even more security, i could trivially further replicate it to offsite storage in the same manner.

All of this takes ~0 time to set up, and require 0 maintenance to keep working.

Meanwhile, Apple has gone backwards - time machine can't even make actual full system backups anymore.