Ethereum's Layer 2 solutions, like Optimistic Rollups and ZK-Rollups, significantly enhance scalability, reduce transaction costs, and maintain security, making them viable for mainstream adoption. Solutions such as Arbitrum and zkSync offer faster transactions—often under a second—compared to Ethereum's mainnet, with fees as low as $0.01-$0.10 during low congestion. They support dApps, NFTs, and DeFi, aligning with mainstream user needs for accessible, efficient blockchain interactions. However, challenges remain: user experience can be complex due to bridging assets, and some solutions face centralization risks or limited ecosystem maturity. Despite these, L2s process millions of transactions weekly, with Arbitrum alone handling over $10 billion in TVL. For mainstream users prioritizing cost and speed, L2s are increasingly practical, though education and UX improvements are needed for broader appeal.