2026 Layer 2 Outlook

The Layer 2 narrative in 2025 bifurcated, with most new launches failing post-airdrop farming, while a few established L2s, notably Coinbase's Base built on OP Stack, captured the majority of growth in TVL and user activity. Key to growth shifted from technical superiority to infrastructure distribution and partnerships, evidenced by major institutions adopting existing L2 solutions.

TVL growth was highly uneven, with Base capturing nearly half of all L2 DeFi TVL, while Arbitrum remained stable but lagged in retail usage. Base's success is attributed to Coinbase's mainstream funnel and key application integrations like Morpho. Conversely, many emerging L2s suffered rapid post-token generation event (TGE) declines, highlighting mercenary participation.

Security and decentralization remain weak points, as most L2s still rely on centralized sequencers and upgrade keys, operating closer to sidechains than trust-minimized rollups, despite progress in fraud proof systems for top optimistic rollups. Bitcoin L2s saw TVL shrink significantly, struggling to attract liquidity without novel catalysts beyond repackaging EVM primitives. Looking to 2026, distribution will intensify competition, with projects like MegaETH potentially shaking up performance expectations through parallel execution.

(Source：The Block)