Ethereum outlines roadmap for ‘Lean Ethereum’ upgrades targeting 10,000 TPS and quantum safety

Ethereum just published its most ambitious technical blueprint in years. The “Lean Ethereum” initiative, first introduced by Ethereum Foundation researcher Justin Drake, lays out a decade-long framework to rebuild the network’s consensus, data, and execution layers from the ground up.

The target numbers are eye-catching: roughly 10,000 transactions per second on Layer 1 mainnet, scaling up to approximately 1 million TPS across Layer 2 solutions. For context, Ethereum currently processes somewhere in the neighborhood of 15-30 TPS on mainnet.

What the strawmap actually says

The roadmap has been formalized through what the Ethereum Foundation calls a “strawmap,” a draft strategic framework showcased at an internal workshop in January 2026. Seven distinct protocol upgrades are planned through 2029. The priorities break down into three buckets: scaling, improved user experience, and hardening Layer 1 systems against emerging threats, with quantum computing resistance sitting at the top of that last category.

The Lean Ethereum architecture itself rests on three pillars: lean consensus, lean data, and lean execution.

Near-term, the “Glamsterdam” upgrade is slated for the latter half of 2026. It represents the first concrete implementation step in this broader vision.

The quantum clock is ticking

The Lean Ethereum roadmap maps out incremental introductions of post-quantum cryptography through successive hard forks stretching into the late 2020s. Quantum-resistant cryptographic signatures will gradually replace current standards, staged across multiple upgrades rather than attempting a single massive migration.

Key developments supporting this transition include work on the zero-knowledge Ethereum Virtual Machine, or zkEVM, which enables cryptographic proofs that certain computations were performed correctly without revealing the underlying data. Client-side proving, another focus area, would let users generate these proofs on their own devices rather than relying on centralized infrastructure.

Privacy gets a seat at the table

The Lean Ethereum framework elevates privacy from a nice-to-have to a core protocol consideration, woven into the roadmap alongside the scaling and security work. Ethereum has historically treated privacy as something to be handled by application-layer solutions built on top of the protocol.

The initiative coincides with Ethereum’s 10th anniversary in 2025.

What this means for investors

Roadmaps are not releases. Ethereum has a long history of ambitious timelines that slip, sometimes by years. The original transition to proof-of-stake, initially expected around 2019, didn’t ship until September 2022.

A credible path to 10,000 TPS on Layer 1 would fundamentally change Ethereum’s competitive positioning against faster Layer 1 alternatives like Solana and Sui. The Layer 2 scaling target of 1 million TPS creates a clearer investment thesis for L2 tokens and the broader ecosystem of applications built on top of them.

Investors watching this space should pay less attention to the roadmap’s ambition and more attention to whether Glamsterdam ships on time later this year. Seven upgrades through 2029 requires coordination across multiple independent client teams, thousands of validators, and a governance process that moves at the speed of rough consensus.

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