If you’re storing petabytes of data sure, but when a tape drive costs $8k+ (Only price I could find that wasn’t “Call for quote”), and only storing less than 500TB, it’s cheaper to buy hard drives.

I’m not sure how important 2 types of media is these days, I personally have all my larger data on harddrives, but with multiple off-site copies and raid redundancy. Some people count “cloud” as another type of storage, but that’s just “somebody else’s harddrive”