Until WD published a worse case write timeout on these drives, and gets it merged into linux/etc I would claim they aren't fit for any purpose because your just

Until WD published a worse case write timeout on these drives, and gets it merged into linux/etc I would claim they aren't fit for any purpose because your just crossing your fingers and hoping your write pattern is ok. They are still hiding fundamental parameters needed to make these drives work properly (number/size of SMR regions, how much CMR is available, and ways to read the percentage the cache+CMR is full at any given time).