Ethereum's latest upgrade, Fusaka, marks a significant shift in the network's upgrade schedule, moving to a twice-a-year hard fork cadence. Activated on December 3, 2025, Fusaka is the 17th major upgrade following the Pectra update from May 2025. The Ethereum Foundation, now under new leadership, aims to accelerate development, responding to the growing demands of the ecosystem. Fusaka introduces important features, the most notable being PeerDAS (Peer Data Availability Sampling), which allows validators to sample segments of data instead of downloading entire blobs. This change is expected to enhance Layer 2 rollups by increasing blob throughput without raising bandwidth needs. Alongside PeerDAS, Fusaka implements a blob base fee minimum, addressing issues with low fees during periods of low demand and ensuring more consistent costs for rollups. These adjustments are designed to lower transaction fees on Layer 2 while maintaining security. Beyond data handling, Fusaka also boosts the gas limit cap to prevent excessive transaction consumption and adds support for the secp256r1 elliptic curve for better device-native signing. While the upgrade doesn't introduce major user experience changes like Pectra did, it focuses on backend improvements that are crucial for scaling the network. Researchers are already planning the next upgrade, Glamsterdam, expected in 2026, indicating that Ethereum continues to prioritize rapid development and resilience against future challenges.