- Fusaka targets Dec 3 mainnet after Oct testnets; delays possible if bugs bite.
- Blob capacity expected to step up 6/9 → 10/15 → 14/21 post-launch, boosting L2 scale.
- ETH bullish case needs a trendline break; sub-$4,200 close flips the script fast.
Ethereum slipped 3% on Friday as developers confirmed plans to roll out the Fusaka upgrade by December 3, pending smooth testnet runs. The timeline was announced during ACDC call #165, setting the stage for Ethereum’s next major network upgrade.
Ethereum Fusaka Upgrade Testnet Schedule and Timeline
Before mainnet, Fusaka will hit three testnets: Holesky on October 1, Sepolia on October 14, and Hoodi on October 28. If no major issues surface during these upgrades, the mainnet release stays on track for early December.
Key Features of Ethereum Fusaka Upgrade
Fusaka introduces 12 Ethereum Improvement Proposals (EIPs) aimed at boosting scalability, efficiency, and smart contract execution. Blob capacity, a critical feature for Layer 2 scaling, is set to expand in two stages, increasing block blob limits from 6/9 to 10/15, and then to 14/21.

Risks and Challenges Ahead for Ethereum Developers
Developers caution that bugs in Ethereum clients could delay the rollout. Researcher Christine Kim estimates only a 50/50 chance of flawless testnet runs. Meanwhile, co-founder Vitalik Buterin defended Ethereum’s validator queue after unstaking times stretched past 40 days.
Ethereum Price Forecast and Technical Analysis
ETH liquidations totaled nearly $90M over the past day, with price retesting the 20-day SMA after rejection at $4,620. If ETH holds support levels, a cup-and-handle breakout could push toward $5,300. A close below $4,200, however, would flip sentiment bearish.