Ethereum Upgrade Schedule - Ethereum developers confirmed the Fusaka upgrade schedule: Holesky testnet on October 1, Sepolia on October 14, Hoodi on October 28, and mainnet on December 3 [1] Blob Capacity Increase - Blob capacity will increase in two phases after Fusaka activation: from 6/9 (approximately 66.67%) to 10/15 (approximately 66.67%) in the first week, and to 14/21 (approximately 66.67%) in the second week [1]