The Ethereum layer two (L2), Optimism, plans to roll out its Sepolia Superchain Upgrade 16a to testnet on Sept. 22 and mainnet on Oct. 2, pending governance approval, tightening safety screws without touching end users. Optimism Superchain 16a Targets Oct. 2 Mainnet With Code Pruning, Flex Controls Billed as a maintenance release, Optimism’s 16a removes