Ethereum's Last Big Upgrade: The zkEVM | Ansgar Dietrichs
•February 23, 2026
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Why It Matters
By removing redundant execution, zkEVM dramatically improves Ethereum’s scalability and cost efficiency, unlocking new use‑cases for both developers and institutions.
Key Takeaways
- •zkEVM enables block verification for nodes without full re‑execution
- •Reduces bandwidth, I/O, and compute constraints on Ethereum
- •Moves ZK rollup proofs from asynchronous to synchronous within slots
- •Represents Ethereum’s largest upgrade, impacting user experience and scaling
- •Transition will be gradual, resembling ongoing hard‑fork evolution
Summary
The video introduces Ethereum’s forthcoming zkEVM upgrade, described by Ansgar Dietrichs of the Ethereum Foundation as the network’s “last big upgrade.” Unlike previous hard forks such as the Merge or EIP‑1559, the zkEVM is framed as an era‑defining transition that will fundamentally change how the L1 validates blocks.
At its core, zkEVM leverages zero‑knowledge virtual machine (ZKVM) proofs to let nodes verify that a block obeyed all consensus rules without re‑executing every transaction. This eliminates the three traditional blockchain bottlenecks—bandwidth, I/O, and compute—by compressing the execution trace into a succinct proof. The shift also moves ZK rollup verification from an asynchronous, hours‑long process to a synchronous, 12‑second slot, delivering orders‑of‑magnitude performance gains.
Dietrichs likens the change to “magical compression” and compares it to Bitcoin’s proof‑of‑work asymmetry, noting that while Bitcoin already uses cheap verification of a hard‑to‑produce hash, zkEVM extends that principle to full block execution. He calls the upcoming phase “Ethereum’s best era” and emphasizes that the rollout will be gradual, resembling the staged rollout of the Beacon Chain and the Merge.
If realized, zkEVM could slash verification costs, boost throughput, and make L1 rollups more efficient, accelerating DeFi adoption and lowering barriers for institutional users. The upgrade’s synchronous proof model also strengthens security by reducing the attack surface associated with delayed rollup finality, positioning Ethereum to retain its dominance as the premier smart‑contract platform.
Original Description
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Ethereum’s next big leap might not look like a single “flip the switch” moment—but it could change how the chain verifies everything. In this episode, Ansgar Dietrichs comes back to unpack the ZK EVM: why “re-executing every block” has been Ethereum’s hidden scaling tax, how real-time proofs finally make a different verification model viable, and what it would take to transition safely without sacrificing the verifiability that keeps Ethereum credibly neutral. They explore the three true bottlenecks of blockchain scaling (compute, IO, bandwidth), the roadmap from optional proofs to mandatory proofs, and why client diversity could look radically different in a ZK-native future.
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TIMESTAMPS
0:00 Intro
0:43 Ethereum’s Biggest Upgrade
4:35 The Core Idea: Verify Blocks Without Re-Executing
10:40 From Bitcoin’s “Verify Cheaply” to Verifying Full Execution
16:22 Cryptography 2.0: Proving Arbitrary Computation
22:56 Scaling All 3 Constraints: Compute, IO, Bandwidth
32:33 Why Ethereum Has Been “Slow” by Design
38:29 3× Per Year: Scaling Now, Not Someday
41:28 ZK Isn’t About Faster Blocks (But Speed Still Improves)
46:33 Rollout Plan: Optional Proofs → Mandatory Proofs
49:59 Dependencies: Block-in-Blobs, Repricing, New State Trees
54:14 Security Reality Check: Performance → Security → Production
1:01:24 Client Diversity in a ZK World
1:10:51 Timeline: ZK Ethereum, Around 2030
1:16:31 Second-Order Wins: L2 Bridging and Beyond Crypto
1:20:49 Closing: Build the Boring Infrastructure, Enable the Apps
RESOURCES
Ansgar Dietrichs
Not financial or tax advice. See our investment disclosures here:
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