In his recent research summary, Vitalik mentioned a topic of great interest: introducing a block-building mechanism with more participants in the Ethereum network. Vitalik emphasized that the current consensus is to have multiple participants contribute transactions to the block, which is considered an effective way to improve network efficiency and decentralization. Additionally, he delved into a deeper issue—how to avoid what is known as the 'last mover' phenomenon. This phenomenon typically refers to the last transaction submitted when packing transactions into a block potentially not being included in the block, leading to delays or failures of certain transactions. Vitalik stated that the public debate on this issue indicates the community's emphasis on this problem and the expectation of finding solutions.