The L2 solution can significantly improve transaction throughput and confirmation speed. This is critical for handling high-frequency transactions or large-scale applications. By moving bulk transaction processing to L2, users can enjoy lower transaction fees, which is especially important for daily usage and micropayments.

Regarding security and decentralization: Although L2 solutions can improve efficiency, their security and degree of decentralization still need to be carefully evaluated. In particular, some L2 solutions may rely on the security of the main chain in some aspects, which may affect its independence.

L2 is designed to be tightly integrated with the Ethereum main chain, with the ultimate goal of making the transition between the main chain and L2 as smooth as possible. As the Ethereum ecosystem continues to develop, L2 technology will continue to mature and may bring more innovations and improvements in the future.

Overall, the introduction of Ethereum L2 is an effective solution to the scalability problem of the Ethereum network. It can significantly improve the network's processing capabilities while maintaining the security of the main chain.