I noticed there are no 18TB drives in use. I've got six WD181KFGX drives which have been running well for over two years. These drives use helium and they hav

I noticed there are no 18TB drives in use. I've got six WD181KFGX drives which have been running well for over two years. These drives use helium and they have a five year warranty. I wonder if they'll all fail at once...