1. ZFS is heavy on memory, vastly increasing the odds that a failure will happen during filesystem operations. This is something many learnt while both encrypti

1. ZFS is heavy on memory, vastly increasing the odds that a failure will happen during filesystem operations. This is something many learnt while both encrypting their drives and overclocking their CPU. Encrypting your drives makes the CPU spend orders of magnitude more time processing filesystem data, and if an error is about to happen it is orders of magnitudes more likely you will have corrupt data because of it. Same goes with memory. 2. If an error occurs on ZFS the consequences are worse, because there are very limited recovery-tools available for ZFS. The official checkdisk is "just restore from tape, it's quicker than fsck anyway". Very enterprise oriented. Now you might be okay with the above. But the risk is greater and the potential consequences are worse. Not because of ZFS being special, but because of the way it makes use of your hardware. Also keep in mind that a lot of people pick ZFS to reduce potential corruption so the addition of ECC is par for the course.