A new 21Shares outlook is sounding the alarm: most Ethereum Layer 2 networks may not survive past 2026 as activity, liquidity, and developers continue to concentrate around a small group of dominant chains.After two years of rapid expansion, the L2 ecosystem is hitting a breaking point. While more than 50 Layer 2s are live today, nearly 90% of L2 transactions are already concentrated on just Base, Arbitrum, and Optimism — with Base alone processing over 60%. According to the report, usage across weaker L2s is down 61% since mid-2025, turning many into so-called “zombie chains.”Several retrenchments highlight the trend: Kinto shut down, Loopring closed its wallet, and Blast’s TVL collapsed by over 90%. Even major DeFi protocols like Aave and Synthetix have scaled back deployments on underperforming L2s due to low liquidity and weak returns.A key catalyst was Ethereum’s Dencun upgrade, which cut data costs by roughly 90%. While great for users, it triggered intense fee competition that pushed most rollups into losses. Base was the only L2 to generate positive revenue in 2025, reportedly earning around $55 million.Looking ahead, 21Shares expects a much leaner L2 landscape — dominated by exchange-backed networks like Base, ETH-aligned designs such as Linea, and a small number of high-performance rollups built for near-real-time execution.⚠️ Not Financial AdviceCrypto is volatile. Always do your own research before investing or deploying capital.🎙️ About The Optimism ShowHigh-signal coverage of Base, OP Mainnet, the OP Stack, and the Superchain — for builders, traders, and on-chain operators who want clarity, not hype.🔔 Follow & SubscribeSubscribe for ongoing coverage of L2 revenue, migrations, and adoption trends — and check our other videos for deeper dives into Ethereum scaling.

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