ChainCatcher news, according to DL News, last week at this year's ETH Berlin event, Ethereum co-founder Vitalik Buterin described some of his regrets regarding the initial design of Ethereum. These issues range from the development of the Ethereum Virtual Machine to smart contracts and the proof-of-stake consensus mechanism. He also stated that even as Ethereum becomes more mainstream, it is still misunderstood.Vitalik stated, "The original EVM design for Ethereum chose 256-bit processing instead of 64-bit or 32-bit, and the initial design was overly complex for 256 bits, which is very inefficient, and can generate a lot of redundant data on the blockchain even when executing simple tasks. Ethereum should have switched from proof-of-work to proof-of-stake consensus mechanism earlier in 2022; we ultimately wasted a lot of time trying to perfect proof-of-stake."Vitalik also mentioned, "The automatic logging of Ethereum transfers should have existed from the beginning; we could have completed the coding in just 30 minutes, yet it became an EIP." The EIP-7708 submitted by Vitalik on May 17 will make this precise change. If he could choose again, he would use SHA-2 for Ethereum's encryption instead of the currently used encryption algorithm called Keccak.