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Evolution Anchor for the L1/L2 Dual-Track Strategy · Ethereum Roadmap vs Independent L1 Economic Incentives

Confidence: Likely Updated 2026-05-26 Review by 2026-09-22 Sources 5 Machine-translated Original (JA)
#systems#ethereum#l2#rollup#pectra#fusaka
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This entry sits under systems index. Read it against ERC-7702 Overview · The Pectra Upgrade Where EOAs Temporarily Gain SCW Functionality for peer / contrast context and fintech index for the broader system / regulatory boundary.

Key facts

  • 2020-10 rollup-centric roadmap proposed = L2 -first strategy formed
  • 2024-03 Dencun (EIP-4844 blob) → L2 costs fell by ~100x
  • 2025-05 Pectra (EIP-7702 smart account) → stablecoin transfers without ETH gas become possible
  • 2026 estimated Fusaka (PeerDAS + further blob expansion) → L2 costs sub-cent
  • Ethereum + all L2 account for ~60%+ of global stablecoin circulation (out of $160B: ~$120B L1 + ~$40B L2)
  • Vitalik’s public stance = Ethereum is a “neutral base layer”, neutral toward all stablecoins

Mechanism / How it works

The “anti-opponent” effect of the L1/L2 dual-track strategy: **when L2 cost becomes sub-cent + UX approaches Web2 ** (stablecoin transfers after Pectra do not need ETH gas), the economic differentiation window for independent L1 (Arc / Tempo / Plasma) is compressed. The original selling points of independent L1 were “low cost + high speed + regulatory controllability” —— but when L2 cost falls below the operating gross margin of independent L1 , independent L1 must rely on non-economic moats (regulatory licenses / large-customer binding / on-chain KYC) to hold up.

Applied diagnosis: with every Ethereum upgrade announcement → test the “differentiation-window width” of independent L1 . After Dencun, Optimism / Base / Arbitrum regain stablecoin circulation (see USD Stablecoin Interchange Market); after Pectra, the “independent L1” economic model of Tempo / Arc comes under pressure; after Fusaka, independent L1 may be forced to convert toward “L2 / Validium / appchain.”

Origin & evolution

The source was in 2017-2018 , after early “L2 proposals” such as Plasma / state channels hit a wall, when Vitalik reintroduced rollup-centric in 2020 年. 2022 The Merge (PoS) solved energy + security model, 2024 Dencun solved L2 cost, 2025 Pectra solved UX (account abstraction), and 2026 Fusaka further compresses cost. The logic embedded in the overall evolution over 5 years: Ethereum does not directly compete with independent L1 on throughput; it makes the L2 ecosystem the “independent L1 killer.” Vitalik personally has no CEO / operating responsibility and speaks purely from a research / governance role → his position is more credible than CEO-type spokespersons such as Allaire / Paolo / Brian.

Sources