[Vitalik: ZK-VMs do not achieve privacy because the current client's prover is not fast enough] On September 24, Ethereum co-founder Vitalik responded on a social platform that the only use case that ZK-VM has not achieved is privacy, which is ironic. During the discussion, he said that the explanation is actually very simple: privacy use cases require the client to generate proofs, but the current client's prover speed is not fast enough to handle other complex tasks besides Merkle branches.