Ethereum’s Layer 2 ecosystem is poised for growth in 2025, with modularity driving investment appeal. Arbitrum’s Arbitrum Orbit enables tailored Layer 3 chains, allowing projects to customize gas tokens and governance, attracting enterprise and gaming applications. Its Stylus tool supports Rust and C++, enhancing flexibility. Optimism’s OP Stack powers modular L2s like Base and Worldcoin, unifying them under a “Superchain” for shared interoperability. Its EVM equivalence reduces customization barriers for developers. Arbitrum’s Layer 3 focus suits bespoke solutions, while Optimism’s Superchain vision fosters ecosystem cohesion.