This article provides an in-depth analysis of the impact of the Dencun-Deneb (Dencun Upgrade), particularly the positive effects on the Layer 2 (L2) network. By introducing EIP-4844 and other proposed improvements, the upgrade significantly reduces transaction costs and increases transaction throughput in L2, laying the groundwork for future data availability in highly concurrent scenarios. The article also explores the impact of the upgrade on the value of Ether and L2 investments, emphasizing the importance of L2 leaders such as Arbitrum and Optimism, and giving attention to the market performance and potential of the Base chain. The authors predict that the upgrades will drive the L2 ecosystem to flourish, creating a positive cycle for users and developers.