Comment by jordanbeiber

Fair enough, I can’t argue with your personal experience, but I can assure you that ZFS is used ”for real” at many shops.

I’ve only used zfs in two or three way mirror setup, on beefy boxes, where the issues you describe are minimal. Also JBOD only.

The thing is that without checksumming you’ve actually no idea if you lose data. I’ve had several pools over the years report automatic resilvering on checksum mismatches. Usually it’s been disks acting up well before smart can tell, and reporting this has been invaluable.