But the wii had the critical problem of ending signature checking as valid whenever it runs into a null byte. So any brute forced signature that starts with a null byte is valid on the wii!xorpads are still needed if you want to decrypt games and/or eMMC using a PC.
...until Boot9 is dumped, in which case the actual keys can be retrieved from the BootROM, and OTP dumps can be decrypted to obtain the eMMC keys.
(Interestingly, the only reason xorpads work is because of a weakness in AES-CTR. AES-CBC, which was used on Wii, doesn't have the same problem.)