Arbitrum Advances ZK Settlement, L1 Withdrawals Could Shrink from Days to Hours

The headline number — days to hours — is the least interesting part. What matters is that Arbitrum is moving toward ZK settlement at all: the network's identity has been tied to optimistic rollups and fraud proofs, so a credible ZK path signals a willingness to compete on the same finality terms as the ZK-native camp. The practical beneficiary is anyone whose capital is currently parked in the withdrawal queue, though the gain only materialises if the mechanism reaches production rather than testnet. Whether other optimistic rollups follow, and whether faster exits pull liquidity back from centralized bridges, is the open question.