Seems like WD effect appeared on their 8TB drives :-/ My NAS has 5x 4TB HGST I bought due to previous Backblaze reports and am waiting to figure out which 8TB drives should I buy - Seagate Archive had really bad real-world usage reviews and now HGST seems to be slipping as well :-(
If you look at the number of drives and the length of time they've had the drives, you quickly realize that you need to take it with a grain of salt. They even state in the article they don't have enough data to come to any conclusion on those drives.