The Ethereum Layer 2s narrative covers the rollup ecosystem — Arbitrum, Optimism, Base, zkSync, Linea, Scroll, Polygon zkEVM, Starknet, and the rest. Heat here tracks both bridge and TVL milestones and the broader debate about Ethereum’s scaling strategy.
What drives heat
- TVL milestones — when an individual L2 crosses meaningful TVL thresholds, both that L2 and the cluster benefit.
- EIP and protocol-upgrade discussion — anything that changes the L1/L2 economic relationship (blob fees, EIP-4844, restaking framings).
- Major application launches — DEXes, perps protocols, and consumer apps moving cross-chain.
How it relates to ETH itself
L2 heat and ETH mood often correlate, but the relationship breaks during specific debates — for instance, during periods when the “L2s extract value from L1” argument is hot, ETH sentiment can dip while L2 heat rises. That divergence is one of the more reliable contrarian read-outs on the site.
Common misreadings
A few large L2s (Base, Arbitrum) dominate the cluster’s heat. A high cluster reading sometimes reflects only those two — always check the asset-participation breadth before treating a heat spike as a broad L2 rotation. Research only — not financial advice.