The tragedy of it all
Tape, rightly, SHOULD still be the default, mainstream option for anything that isn't required to be online.
It SHOULD be massively cheaper than disk, for everything beyond a primary, online copy.
It is inherently much more flexible, automatable, reliable, scalable and manageable than any system that bundles the electronics and read-write mechanisms with the media package.
(it's also massively much more dense, requiring less physical estate)
Somehow, the tape manufacturers missed out on the opportunity, They let the disk guys sell to management on the basis of lower cost per GB, without challenging all the downsides; when they should have been offering a much lower cost, with all the advantages.
It LTO had been price pitched correctly, and staged file aging been readily pushed onto the desktop, every home user would have one - you want to watch a movie you downloaded three years ago and haven't seen since - no worries - two minutes later it's back on disk.
You want to have every document your organisation has ever scanned readily available on every desktop - no worries, within seconds of your request the robots either got it online, alerted the op to get it from the near-online racks, or issued a request to the offsite facility.
You want to have triple redundancy of everything, ever - no worries, the robot spends it's evenings defragging and replicating everything you think is important for multiple offsite copies, and requesting back tapes that might be aging a bit to reduplicate.
etc etc etc.
Tape should, by all rights, rule the off-line data world. Sure it requires a bit of management, but mostly, the tape vendors have no-one but themselves to blame.