I appreciate the reply, but my warning consumer SSD is not incorrect. Perhaps I should have clarified that While they typically have a small overprovisioning of 7%, enterprise SSDs have close to 4 times as much, exactly to allow more writes (which is very relevant if running a ZFS raid on the drive). Keeping 10-20% headroom will prolong your SSD's life significantly, and increase performance of ZFS.
Maybe because your statement about SSDs is incorrect. Consumer SSDs have spare blocks too, and wear leveling prevents the scenario you're describing.