Historical retrospective · Layer 2
Optimism advanced the optimistic-rollup approach
Optimism’s early mainnet era brought EVM-compatible optimistic rollup execution to applications seeking lower costs than Ethereum mainnet.
Compatibility can reduce developer migration work while moving execution and transaction posting into a different trust and operational setup.
Optimism became one of the visible projects in Ethereum’s rollup-centric scaling direction.
Lower fees do not mean identical decentralization; users should examine sequencer, bridge and upgrade controls.
Primary source
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