According to BlockBeats, on September 24, Ethereum co-founder Vitalik Buterin addressed a discussion on social media regarding the statement, 'The only unachieved use case for ZK-VM is privacy, which is ironic.' Buterin explained that the reason is straightforward: privacy use cases require the client to generate proofs. However, the current speed of client-side provers is not yet sufficient to handle complex tasks beyond Merkle branches.