Kaia has launched its native MEV component. To compare it with Ethereum, ETH's builders and relays are third-party entities, while Kaia's are official. Normally, on the Ethereum mainnet: - Builders are responsible for accepting various bots' arbitrage strategies (including sandwich attacks) and then assembling entire blocks; - Relays are responsible for secretly forwarding these blocks to nodes, allowing nodes to freely choose the block with the highest total fees, while ensuring nodes don't steal the strategies. But Kaia's MEV combines the builder and relay into one, turning it into an auctioneer. This means that bots writing strategies can directly send their transactions secretly to the auctioneer, who then sorts the transactions, prioritizing the highest bidder. Since Kaia's block interval is only 1 second, the ETH mainnet's process of building first and relaying later would indeed be too slow. Plus, Kaia is still in its early stages and can't yet achieve the same level of decentralization as ETH. For now, launching a native MEV component is good enough.