Delta's hard fork has been deployed on various chains based on Optimism, including OP Mainnet, Base, and Zora.
This update aims to reduce the fixed cost of L1 transaction fees and has achieved the expected results.
Span Batches are a key feature of Delta upgrade, which merges consecutive Layer 2 blocks into one batch to reduce the amount of data published to Ethereum. It is expected that L1 fees will be reduced by 6% to 11%. Optimism is a Layer 2 chain ecosystem that utilizes optimistic rollups to lower transaction costs for dapps.