The same principle applies to SHA-512 just the same (much cheaper to attack non-stretched SHA-512 hash than attacking directly the bcrypt hash). There are both

The same principle applies to SHA-512 just the same (much cheaper to attack non-stretched SHA-512 hash than attacking directly the bcrypt hash). There are both MD5 hashes and SHA-512 hashes lying around, which makes "hash shucking" possible for both of them.