Vitalik reveals some regrets about Ethereum's initial design

At the ETHBerlin event, co-founder of Ethereum, Vitalik Buterin, described some regrets he had in the initial design of Ethereum. Vitalik stated that there were a series of things he could have done differently, ranging 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. Organizer of ETHBerlin, Afri Schoeden, asked, "Based on everything you've known and learned over the past 10 years, if you could start over today, how would you build Ethereum differently?" Vitalik stated that the initial design of Ethereum's EVM chose 256-bit processing instead of 64-bit or 32-bit, and that the initial design was too complex for 256-bit and was very inefficient, even for simple tasks, which could result in a lot of redundant data on the blockchain. Additionally, Vitalik stated that Ethereum should have switched from Proof of Work to Proof of Stake earlier than 2022. Vitalik also mentioned that "automatic logging of Ethereum transfers should have existed from the beginning, and we only needed 30 minutes to code it, but it became an EIP." Vitalik's EIP-7708, submitted on May 17th, will make this precise change. Vitalik also stated that if he had to choose again, he would use SHA-2 for encrypting Ethereum instead of the currently used encryption algorithm called Keccak.