Shared libraries

I believe it's intended for embedded use, where they can update the entire image in one go to keep everything consistent but they may want to add and remove modules depending on the context.

(eg. I could see that being used for something similar to how, as explained by the me_cleaner docs, Intel's UEFI is made of modular blocks and the firmware is updated as one blob, but each motherboard model will have different blocks present and absent... before Intel revised their signing to disallow it, me_cleaner would delete some of the modules.)