After reviewing Brevis @brevis_zk's architecture design, I think its most ingenious aspect lies in its realistic choice: instead of simply choosing between pure ZK and non-ZK, it cleverly uses two modes to answer the questions of maximum security and maximum practicality. This hybrid architecture can be understood as follows: The pure ZK mode is the idealistic king of on-chain applications, pursuing ultimate decentralization and trustlessness. By introducing heavy staking security through EigenLayer AVS, it essentially provides validators with double insurance—both economic and cryptographic. This is orthodox, but potentially costly and slow. In my view, it's designed for on-chain applications requiring the highest level of security. The coChain mode is the culmination of pragmatic wisdom; this is the essence of Brevis @brevis_zk's approach. The real innovation lies not in blindly pursuing full ZooKeeper replication, but in designing a cleverly crafted proposal-challenge game. The proposer performs the work first, and then the challenger and ZooKeeper proof act as the ultimate judges to ensure honesty. I believe it transforms the enormous overhead of full-process verification into precise, on-demand challenge-based game theory, using economic incentives to solve technical bottlenecks. In actual operation, this undoubtedly significantly improves efficiency and scalability. Brevis's architecture reveals an industry trend: future blockchains will not have only one consensus mechanism. True competitiveness comes from the ability to flexibly adjust the balance between security and efficiency according to the scenario. The pure ZooKeeper model is its cornerstone of trust and brand statement, while the coChain model is its pragmatic engine for large-scale application. This dual-mode approach may better represent the evolutionary direction of next-generation infrastructure than simply pursuing a single technological path. It is not limited to the technology itself but also incorporates the wisdom of mechanism design and economics.