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It was a stupid argument, and I'm willing to bet that it'll finally kill off tape, because really, there's only two valid standards left in this day and age that'll satisfy the data size arguments: LTO, and IBM's (venerable) 3592 series, which (not surprisingly) do not inter-operate with each other, unless you've paid IBM a lot of money for a TS4500 and expansion frames, which appears to allow mixing both 3592 and LTO drive frames (Dx5) within the same logical library.