I can see that you don't know an awful lot about Object Stores and how they provide global protection for component failure, unlike Tape and Tape Robots. I would not promote the use of legacy disk arrays as they do have a finite life, however, servers are a totally different proposition and the servers in conjunction with JBOD with a bit of intelligent Software Defined Storage makes a lot of sense, until they invent the software defined Tape Library of course.
With Object Storage you are moving to an environment that enables Metadata searches and very fast retrieval of data to higher performance storage and the ability to push ultra-cold data out to public cloud to keep cost down as low as possible, a bit quicker than sending it off to Iron Mountain?