Some protections rely on the physical angular position of sectors in the single track bitstream. A format encoding that would have to encode the raw EFM bits *and* a detailed timing code encoding the exact coordinates of the data on disc.
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I feel that optical disc emulators of that sort would have a implementation-specific format due to the performance constraints; and trying to constrain a format intended for archival to those limitations would be unnecessarily restrictive.
I think it's important to recognize that the purpose of archival is not to perfectly replicate the original, but to perfectly replicate the *useful information* encoded in the original. I.e. there is no point in storing voxels of atoms.
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In that sense, it probably makes more sense to have a standard but *extensible* format that can encode all useful data at a common abstraction level for optical media *and* platform-specific metadata.
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Something along the lines of the PNG format and required/optional chunks?
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