Comment Tape has a razor and blade model (Score 1) 47
The drive is the razor, and the tape cartridges are the blades.
When was involved in the design of tape libraries back in the late 90's and early 2000's, the cost of the tape cartridge was significant. The bulk of the cost was the license fees paid to the designers of the tape cartridges due to patents. Although it's been quite some time since then, I'm sure the same model holds. Heck, there could even be technical "genuine" tape cartridge authentication methods used (in the same manner as ink cartridges) as even at at the time I was involved, the there was discussion about using near field RF tags in the cartridges in conjunction with bar codes.
When you have a tape library with 100's to 1000's of tape cartridges in it, the costs add up fast.