Vitalik Buterin and Anatoly Yakovenko are publicly debating the security of Ethereum's Layer-2 (L2) networks, intensifying the rivalry between Ethereum and Solana. Buterin asserts that Ethereum L2s benefit from the base layer's security, making them resistant to 51% attacks. In contrast, Yakovenko argues that these L2s face significant risks akin to cross-chain bridges, due to complex code, multisig vulnerabilities, and centralized off-chain control. The debate has reignited the ETH-SOL competition, with both blockchains showing similar market performance. Ethereum advocates argue that advanced rollups function like Layer-1 protected vault contracts, with improvements such as fraud proofs enhancing security. However, Yakovenko remains skeptical, describing the issue as a fundamental design flaw. The discussion has sparked strong reactions on crypto Twitter, underscoring the ongoing tension between decentralized scaling and vertical integration.