My #ZFS pool (RAID-Z1 with 4x4TB spinning disks) is running with one damaged drive. Now after the 5th or 6th time SATA errors caused the whole machine to almost stall for minutes, I finally ordered two new replacement disks.
The issue with ZFS is, it works too well ๐ -- after super smooth replacement of already 2 failed drives, another one starting to fail doesn't "feel" as alarming any more as it should ๐ (of course I have another backup)
Hardware quality is very underwhelming though. A pool with 4 disks operating for 8 years (24/7, but in a private/family use scenario) and soon, there will be only one of the original disks left? Bah. ๐ง