Internet reports that in response to the hacking attack on the Bybit exchange on February 21 and a loss of US$1.5 billion, Ethereum core developer Tim Beiko said that although some people in the encryption industry have called for the Ethereum network to be restored to its pre-attack state, from a technical perspective, this is almost impossible to achieve. Beiko emphasized that unlike the 2016 TheDAO hacking incident, this attack did not violate the rules of the Ethereum protocol, and a rollback would lead to widespread and hard-to-repair chain reactions, and may even have more devastating consequences than hacker losses. In addition, rolling back will undo all settled on-chain transactions, but cannot reverse off-chain transactions. People in other industries also expressed similar views. Ethereum educator Anthony Sassano points out that the complexity of the current Ethereum ecosystem makes simply rolling back infrastructure impractical. Yuga Labs 'vice president of blockchain even warned that the cost of rolling back could well exceed US$1.5 billion. Previously, when asked if he supported rolling Ethereum back to the state before the hacking incident, Bybit CEO Ben Zhou said: "This is not something that one person can decide. Based on the spirit of blockchain, maybe it should be decided through community voting, but I'm not sure."