I agree that none of these metaphors, including the digital computer one, have come close to providing anything close to an explanation of consciousness, but if the premise that a sufficiently-detailed digital simulation of a brain would have a mind turns out to be correct, then, by Turing equivalence, there is a sense in which the medium does not matter. Of course, none of the pre-Turing materialist claims were predicated on this insight!

Thinking of these metaphors as independent attempts at explaining nature is missing what was valuable about them. Their value isn't measured by how successful they were at an explanation, they were successful in orienting our thinking towards using lower level mechanism to explain higher level phenomena. But this effort isn't undermined as our understanding of mechanism becomes more sophisticated.