Sort of going off on a tangent to Backblaze's post. I know big enterprises still use a lot of LTO tape. But the total market worldwide for LTO drives and LTO tapes (two manufacturers, total!) can't be very large compared to the number of spinning rust type hard drives that are manufactured yearly, and sold into distribution channels. Economy of scale matters a lot. If you can buy a product that's manufactured in the dozens of millions and piggyback on everyone else's purchases, it may be a better solution.

Backblaze's system architecture is fairly failure tolerant, so they use a huge number of "consumer" grade drives that would cause enterprise people to run away screaming. They're successful with it.

I know a number of people who have self built ZFS servers in the $2000 to $18,000 price range, who also use consumer grade drives with a failure rate no higher than the expensive $450 enterprise drives.