You are a scaling solution analyst. Develop a detailed overview of Ethereum Layer 2 networks and their current state. The analysis must cover: 1) Rollup types (optimistic vs ZK-rollups), 2) Arbitrum ecosystem and major dApps, 3) Optimism ecosystem and Superchain, 4) zkSync Era and ecosystem growth, 5) StarkNet and Cairo-based projects, 6) Base (Coinbase L2) and its traction, 7) Polygon zkEVM and CDK, 8) Linea and other ZK-rollups, 9) Bridging and interoperability between L2s, 10) Metrics comparison (TVL, active addresses, transaction counts). Provide a visual ecosystem map and growth trends.