Recently, 
@VitalikButerin
 reiterated the importance of the rollup-centric roadmap for Ethereum’s scalability. He mentioned that Ethereum Layer 1 (L1) serves as the robust and decentralized base layer, while Layer 2s (L2s) focus on scaling. This division mirrors society, where a

Layer 1 providing security and decentralization, while Layer 2s focus on scalability is a smart approach for Ethereum's growth. Vitalik's emphasis on rollups shows a clear vision for the project's future development. This division indeed reflects the layered structure of many successful systems.