Ethereum L1 and L2 Strategy: Scaling, Interoperability, and Future Growth

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• L2s shift focus from scaling to differentiation, innovation, and customization
• Ethereum L1 remains the core settlement, liquidity, and DeFi hub
• ZK technology expected to enable massive L1 scaling without compromising decentralization
• L2s act as distribution engines extending Ethereum’s security and resilience
• Interoperability and shared liquidity are key to reducing ecosystem fragmentation

Ethereum’s Platform team has outlined a long-term vision for how Layer 1 (L1) and Layer 2 (L2) networks can work together to scale the ecosystem while maintaining its core principles. The goal is to ensure that both individual and institutional users can access and benefit from Ethereum’s foundational properties, including security, decentralization, and resilience.

Shift in the Role of L2s: Initially, L2 solutions were primarily designed to scale Ethereum. Over time, their role has evolved. Today, L2s are increasingly focused on differentiation, offering unique features, specialized services, custom execution environments, and tailored go-to-market strategies. This shift allows L2s to build independent onchain economies while still leveraging Ethereum’s core infrastructure.

Role of Ethereum L1: Ethereum L1 continues to serve as a permissionless and highly resilient base layer. It functions as the primary hub for settlement, shared state, liquidity, and decentralized finance (DeFi). The network is also advancing its scalability roadmap. Developments in zero-knowledge (ZK) technology are expected to increase throughput significantly while preserving core values such as censorship resistance, open-source development, privacy, and security.

Why Multiple Chains Are Necessary

Even with significant scalability improvements, a single blockchain cannot support the full spectrum of global use cases, making multiple chains a necessity. Layer 2 solutions and alternative chains enable application-specific specialization, support non-EVM environments, enhance privacy, and offer customizable transaction and pricing models tailored to different needs. They also provide ultra-low latency for real-time applications and enable compliance-focused architectures for regulated industries. By distributing workloads across multiple chains, the ecosystem fosters faster innovation cycles while maintaining efficiency, flexibility, and scalability.

Mutual Benefits Between L1 and L2s

The relationship between L1 and L2s is designed to be complementary. L2s benefit from Ethereum’s security, decentralization, and developer ecosystem without bearing the high costs of maintaining their own validator networks. They also gain access to Ethereum’s liquidity, user base, and infrastructure services such as oracles and naming systems.

In return, Ethereum benefits from increased demand for ETH, expanded network effects, and broader adoption driven by L2 innovation. L2s also act as distribution layers, extending Ethereum’s capabilities to more users globally.

Technical Direction and Integration

L2s seeking deeper integration with Ethereum are encouraged to pursue:

• Synchronous composability
• Full interoperability and shared liquidity
• Advanced decentralization stages (Stage 2)
• Native rollup architectures

Transparency around security models is emphasized, ensuring users understand the guarantees provided by each L2.

Security and Trust Standards: L2s aiming for trust minimization are expected to reach at least Stage 1 and pass the “walkaway” test, allowing users to safely exit to L1 even in adverse conditions.

Ethereum Foundation Initiatives

The Ethereum Foundation (EF) is actively supporting the multi-chain ecosystem through a range of strategic initiatives aimed at improving scalability, security, and usability. These efforts include scaling Layer 1 and increasing blob capacity to enhance data availability, investing in privacy, security, and trustless technologies, and improving liquidity access across both L1 and L2 networks. The EF is also advancing native rollup research, enhancing interoperability and overall user experience, and collaborating with monitoring platforms to ensure greater transparency and accountability across the ecosystem.

Addressing Fragmentation

One of the key challenges identified is ecosystem fragmentation. Efforts are underway to improve cross-chain user experience, developer tools, and interoperability standards, while also aligning the broader Ethereum narrative. Ethereum’s evolving L1 and L2 framework highlights a modular approach to scaling. By combining a secure base layer with flexible execution environments, the ecosystem aims to support diverse applications while maintaining its foundational principles.

The long-term success of this model depends on continued collaboration, experimentation, and alignment between L1 and L2 networks. The Ethereum Foundation recently introduced a “Strawmap” roadmap and released a new mandate outlining its long-term vision for protocol development, focused on scaling, decentralization, and ecosystem growth.