@staff1
Zero-Knowledge Rollup (ZK-Rollup) sequencers are becoming centralized chokepoints due to efficiency and cost trade-offs. Sequencers batch and order transactions off-chain before submitting proofs to Layer 1, requiring significant computational power and low latency. Centralized entities, often run by rollup providers, manage this to optimize speed and reduce costs, as decentralized alternatives are slower and more resource-intensive. This concentration creates a single point of failure, risking censorship, downtime, or favoritism if the sequencer prioritizes certain transactions. Many ZK-Rollups, like zkSync and Starknet, currently rely on centralized sequencers or cloud providers (e.g., AWS), undermining decentralization goals. While decentralization is a stated priority for some projects, technical complexity and economic incentives delay progress, leaving sequencers as critical, centralized bottlenecks in the system.
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