Ethereum completes its final BPO fork for the Fusaka upgrade, further increasing the upper limit of data availability.

Ethereum developers have completed the second and final "Blob Parameters Only (BPO)" fork planned within the Fusaka upgrade cycle. This update increases the target number of blobs in a block from 10 to 14, and the upper limit from 15 to 21, aiming to further improve the network's data availability. The official statement indicates that the BPO mechanism allows Ethereum to independently adjust key parameters such as blobs in stages without waiting for a large annual upgrade, thus gradually testing and releasing network capacity in a more controlled manner. Blobs were initially introduced in the 2024 Dencun upgrade to provide low-cost data storage for Layer 2 Rollups; this type of data is automatically cleared after approximately 18 days on the mainnet. This adjustment is seen as the final step in the Fusaka upgrade. Developers point out that as the upper limit of blobs per block gradually increases, Ethereum can provide more data space for the Layer 2 network, helping to maintain stable transaction costs for Rollups as on-chain activity increases. (The Block)