Vitalik Buterin, co-founder of Ethereum, recently shared four essential traits that a truly sustainable and scalable layer-1 (L1) blockchain must possess.
In a post highlighting breakthroughs in real-time zero-knowledge proof generation, he noted that Ethereum and similar networks still face technical hurdles before reaching real-time scalability for everyday users.
Buterin’s observations came as developers celebrated progress on generating ZK proofs in real time, yet he warned that more work remains to fulfil the long-term vision.
Real-Time Worst-Case Performance
The first characteristic Buterin stressed is that performance measurements must reflect worst-case scenarios, not just average conditions. He argued that safe L1 use demands predictable behaviour even under heavy load or stress.
If a blockchain can only maintain real-time speeds under ideal conditions, it cannot guarantee reliable service for all users. According to Buterin, without ensuring worst-case performance, networks risk outages or unexpected slowdowns when demand peaks.
Need for Formal Verification
Next, Buterin pointed out that existing proof systems lack formal verification. In other words, their security assurances rely on probabilistic trust rather than strict mathematical proof. He emphasised that layer-1 security cannot hinge on uncertainty.
For a blockchain to be production-ready, its underlying cryptography must be backed by explicit, verifiable guarantees. Until proof systems are formally verified, he believes they cannot be trusted to protect users’ funds and data in all possible situations.
Cutting Energy Requirements
Buterin’s third point focuses on energy consumption. He noted that proving zero-knowledge statements currently requires about 100 kilowatts of power.
While this model uses a 1-of-n trust approach, meaning only one prover must be honest, he argued that it is still too energy-intensive for widespread adoption.
His goal is to reduce the energy needed for proof generation to around 10 kilowatts, making it practical for individuals to run proof systems from home. Lowering power demands is crucial to decentralising the network and reducing reliance on large data centres.
Raising the Gas Limit
The fourth characteristic involves boosting the layer-1 gas limit by ten to one hundred times its current level. The gas limit determines how much activity the network can handle in a single block.
Buterin restated Ethereum’s aim to raise this limit significantly. However, until the challenges around worst-case performance, formal verification, and energy use are resolved, increasing the gas limit remains out of reach.
He concluded that achieving real-time, secure, and eco-friendly proofing is a prerequisite for any meaningful expansion of transaction throughput.
Shaping the Future Roadmap
Beyond listing these four traits, Buterin also released a new research proposal intended to reshape Ethereum’s scaling roadmap. His proposal emphasises user privacy and supporting local node infrastructure.
By encouraging more people to run full nodes, Ethereum can become more resilient and decentralised. Buterin believes that shifting the network toward local node adoption will strengthen security and give users true control over their data.
This approach contrasts with models that depend on a few large providers and highlights Ethereum’s commitment to decentralisation.
Vitalik Buterin’s four characteristics outline a clear path toward a robust layer-1 blockchain. Ensuring real-time worst-case performance, achieving formal verification, slashing energy requirements, and raising the gas limit are all interlinked goals.