According to Dr. Roy Cideciyan, research scientist, IBM Research, Zurich, Switzerland
"Removable magnetic tape storage is the most cost-efficient way to store cold data and therefore will be used for many decades to come. Cloud storage companies are either storing cold data on tape drives or are studying how to reduce their storage cost by storing data on magnetic tape cartridges. Recently, IBM Zurich Research lab in cooperation with Fujifilm demonstrated a world record areal density of 317Gb per square inch for storing data on Strontium Ferrite magnetic tape.
The first 2 paragraphs of the above article submitted to IEEE describe why an end to magnetic tape storage is not on the horizon and therefore may be of interest to your readers..."