Vitalik Updates Ethereum Roadmap: From Merge to 'Lean Refactoring', with STARK, AI, and Privacy Reshaping the Technical Foundation
Vitalik Buterin has updated Ethereum's long-term roadmap, outlining a major shift from the post-Merge evolution toward a "Lean Ethereum" vision. The update builds on the 2023 framework but reorders priorities and introduces new concepts.
Key continuations include improving consensus (single-slot finality), scaling data availability (larger blobs), simplifying light client verification with SNARKs/STARKs, and protocol simplification.
Major adjustments involve significantly prioritizing quantum resistance due to heightened perceived threats, while deprioritizing items like VDFs and some EVM improvements. Technical replacements are planned, such as moving from Verkle trees to a unified Binary Tree and eventually PBTs, and rethinking state management with "New State Types."
Notable new additions are:
1. Making **privacy a top-tier priority**, aiming to build it natively into the protocol.
2. **Radical scaling under post-quantum conditions**, using techniques like leanSPHINCS signatures and zkzk frames.
3. **Protocol "Lean-ification" and formal verification**, leveraging modern AI tools to make full formal verification feasible.
4. Exploring **Blob and Gas futures** for future capacity.
5. Developing **Native Rollups**, deeply integrating rollup capabilities into the protocol.
6. **Reimagining the EVM's future**, potentially exposing a simpler, modern instruction set (e.g., leanISA or RISC-V), with EVM becoming a compatibility layer.
The core philosophy shifts toward specializing mechanisms for high-load activities (transfers, swaps, privacy) to gain scalability, rather than attempting to infinitely scale all activities. It also elevates **recursive STARKs and AI-assisted formal verification** as foundational infrastructure.
In summary, Ethereum is embarking on a systemic "third-generation" redesign—Lean Ethereum—involving replacements or rewrites of major components. The goal is to achieve a quantum-safe, privacy-first, secure, decentralized, and highly scalable network while maintaining a lean and verifiable protocol.
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