Re:HSM
Yes, its true that HSM has been around for ages, but it's much better integrated now, with the arrival a few years ago of LTFS, which enables the tapes to be standalone (file metadata is stored on the tape with the files themselves) and portable between systems while still being able to form part of an HSM solution.
It's actually quite a cool innovation, if you can work out how to use it.
Of course, it does not prevent you using recent generation LTO tapes and drives as raw data storage under the control of, say, TSM.