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It was never intended for Orikalkum (or above) salvage to be added with the rework, and at the time there was also nothing to replace.
It was initially made and seen in the M&S beta's cache so as to act as something we can place on future drop tables - if needed - but since it wasn't required we removed it from the list of items. It's still technically there in the code, for us. I have a few personal ideas of where it could pop up in the future but we'll see in due time :)