Deep Dive
1. Fusaka Upgrade Activation (3 December 2025)
Overview: This was Ethereum's largest infrastructure update, bundling twelve EIPs. It makes the network more scalable and secure for everyday users and developers.
The upgrade's centerpiece is Peer Data Availability Sampling (PeerDAS), which lets validator nodes verify rollup data by checking small samples instead of downloading entire blobs. This reduces hardware demands and supports more Layer 2 activity. It also introduced the EVM Object Format (EOF), which restructures smart contract code into separate sections for validation, data, and metadata. This makes contracts easier to audit and paves the way for faster execution and more predictable gas costs.
What this means: This is bullish for Ethereum because it lays the technical foundation for cheaper and faster Layer 2 transactions. For users, this means lower fees on networks like Arbitrum and Optimism. For developers, it enables more robust and secure smart contracts.
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2. Glamsterdam Development & Roadmap (Target H1 2026)
Overview: The next major upgrade, Glamsterdam, is in active development with a testnet phase underway. It aims to further scale Ethereum's base layer and improve fairness in block production.
Key proposals include EIP-7732 for Enshrined Proposer-Builder Separation (ePBS), which decentralizes block building to reduce MEV centralization risks. Another major feature is Block-level Access Lists, designed to enable parallel transaction processing, which could significantly speed up node operations and network throughput.
What this means: This is bullish for Ethereum as it directly tackles scalability and decentralization—two critical challenges. If successful, users could experience faster transaction confirmations on the mainnet, while the network becomes more resilient and fairer for all participants.
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3. Client Updates & Increased Development Cadence (2026)
Overview: Ethereum's development momentum is accelerating, evidenced by frequent client updates and a formal shift to a biannual upgrade schedule starting in 2026.
Core client teams are continuously optimizing performance. For example, Nethermind released v1.33.0 with a new UI and experimental pruning to manage disk growth. Separately, the Erigon client announced its next release will set the default gas limit to 60 million, following community recommendations. This structured, faster-paced development cycle, managed by the reorganized "Protocol" team, aims to deliver improvements more reliably.
What this means: This is bullish for Ethereum because a faster, more predictable upgrade cadence means new features and optimizations reach users sooner. It signals a mature, highly active developer ecosystem committed to long-term innovation and network health.
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Conclusion
Ethereum's codebase is advancing through a clear, accelerated roadmap—from the foundational Fusaka upgrade to the efficiency-focused Glamsterdam development—supported by robust client improvements and a growing developer base. How will the successful implementation of ePBS in Glamsterdam reshape validator economics and network security?