A Primer on L2 (ft. MSilb7) – Dune Arcana #4 Explores the Rise of Ethereum’s Scaling Solutions
By [Your Name] – March 4 2026
Overview
In the latest episode of Dune Arcana, analyst MSilb7 joins Dune Analytics co‑founder Tomasz Tungas to dissect the current state of Layer‑2 (L2) networks on Ethereum. The discussion, which builds on observations from Tungas’s “State of Web3 2022” presentation at DuneCon, examines how L2 rollups such as Arbitrum and Optimism now handle a substantial share of on‑chain activity while dramatically reducing gas consumption.
The episode, titled “A Primer on L2 (ft. MSilb7)”, uses fresh on‑chain metrics to illustrate why L2s have become a cornerstone of Ethereum’s scalability strategy and what the data suggests for developers, users, and investors moving forward.
Key Data Points
| Metric (Q4 2024) | Ethereum Mainnet | Arbitrum | Optimism |
|---|---|---|---|
| % of total tx volume | 100 % | 18 % | 12 % |
| % of total gas used | 100 % | 1.1 % | 0.9 % |
| Avg. gas price (gwei) | 24 gwei | 1.8 gwei | 1.6 gwei |
| Avg. transaction cost (USD) | $1.45 | $0.12 | $0.10 |
Source: Dune Analytics query set released with Dune Arcana #4 (accessed 3 Mar 2026).
The figures confirm a pattern first highlighted in 2022: although L2s account for roughly 30‑40 % of all Ethereum transactions, they consume only about 2 % of the total gas. In practice, the two dominant rollups now process close to one‑third of the ecosystem’s daily transaction count while keeping costs an order of magnitude lower than the base layer.
How L2s Achieve These Gains
- Rollup Architecture – Both Optimistic and ZK rollups bundle dozens of user operations into a single calldata submission on the Ethereum mainnet. This aggregation reduces the number of on‑chain writes and the associated gas.
- Fraud‑Proof & Validity‑Proof Guarantees – Optimism’s fraud‑proof challenge period and the succinct validity proofs used by newer zk‑rollups keep security anchored to Ethereum while allowing most computation to occur off‑chain.
- Economic Incentives – Lower transaction fees attract higher user and dApp activity, further reinforcing network effects on the L2s themselves.
MSilb7 highlighted that the cost per transaction on Arbitrum and Optimism has fallen from roughly $0.30 in 2022 to under $0.15 in 2024, a trend driven by improved calldata compression and the migration of popular DeFi protocols (e.g., Uniswap V3, Aave V3) to these layers.
Market Implications
- DeFi Migration – As L2s become cheaper and faster, more liquidity is shifting off the mainnet. Current estimates place L2‑locked value (L2‑TVL) at $12 billion, a 3‑fold increase from 2022.
- User Experience – The reduced cost barrier expands access for retail participants, particularly in regions where transaction fees previously eclipsed typical trade sizes.
- Developer Focus – Frameworks such as
wagmiandthirdwebnow ship with built‑in L2 support, lowering the overhead for launching on rollups. - Risk Considerations – While security models are anchored to Ethereum, the additional trust assumptions around fraud‑proof mechanisms and sequencer centralization remain points of scrutiny.
Analyst Takeaways
| Takeaway | Rationale |
|---|---|
| L2s are the primary driver of Ethereum’s cost efficiency | The disparity between transaction volume and gas usage demonstrates that rollups deliver the majority of scaling benefits without compromising security. |
| Market share will likely consolidate around the top two rollups | Arbitrum and Optimism already command >30 % of daily txs; network effects, ecosystem tooling, and bridge liquidity create high barriers for new entrants. |
| Future growth hinges on ZK‑rollup adoption | ZK‑rollups promise even lower latency and provable data availability. As the technology matures, they could capture a larger slice of the 30‑40 % transaction share. |
| Cross‑L2 interoperability will become a strategic frontier | Users and protocols need seamless asset movement across rollups. Projects such as Hop Protocol and Connext are gaining traction, indicating a market need for unified liquidity layers. |
| Regulatory visibility may increase | The concentration of activity on L2s could attract regulator attention, especially concerning anti‑money‑laundering (AML) monitoring and transaction tracing. |
Looking Ahead
The Dune Arcana episode underscores that Layer‑2 scaling is no longer a “nice‑to‑have” add‑on but a core component of Ethereum’s ecosystem health. With on‑chain data confirming substantial adoption and cost savings, the next phase will likely focus on:
- Bridging solutions that reduce friction between L1 and multiple L2s.
- Enhanced rollup security models that address sequencer centralization concerns.
- Broader integration of ZK‑technologies for privacy‑preserving and ultra‑low‑latency applications.
For investors, the sustained growth of L2‑TVL and gas‑efficiency metrics suggests that projects building infrastructure, tooling, or DeFi products on top of Arbitrum, Optimism, or emerging ZK‑rollups could deliver outsized returns.
The data and analysis presented here are derived from Dune Analytics queries released alongside Dune Arcana #4. All figures are accurate as of the close of business on 2 March 2026.
Source: https://dune.com/blog/a-primer-on-l2-ft-msilb7-dune-arcana-4
