“Did you miss the “portable 125TB” part? “
If it’s rolling tape it has to do it the way tape drives roll tape, as far as I know. That requires complexity. Tape drives at the height of their use were amazingly complex and reliable. But start, stop, FF, rewind, search beats hell out of the mech as well as grinds down the tape path. I’m abosolutely stunned that they have a present day use.
I've worked in data centers where it's necessary to have archival storage. For example, someone needs to retrieve a file they had on their workstation back in January of last year (and deleted it in February, so it's not on more current backup copies).
Buying tapes for this purpose is still cheaper than buying hard drives for every copy you need.