Not really, because the signature is tied to a specific device and a specific upgrade. It can never be used again unless Apple signs it again. Apple had some a

Not really, because the signature is tied to a specific device and a specific upgrade. It can never be used again unless Apple signs it again. Apple had some arguments about precedent and the like, and that’s fine, but from a technical perspective they could have easily done it and it wouldn’t have weakened anything else, unless they decided to sign the software again later.