Ethereum's co-founder cites "fundamental security limits of bridges" as the key reason for his disapproval.
In a Reddit post on Friday, Vitalik Buterin, the co-founder of Ethereum (ETH), outlined critical security concerns surrounding cross-chain bridges in the blockchain ecosystem. As told by Buterin, storing native assets directly-chain (Ethereum on Ethereum, Solana on Solana, etc.) provides a certain degree of immunity against 51% attacks. Even if hackers manage to censor or reverse transactions, they cannot propose blocks to take away one's crypto.
https://cointelegraph.com/news/vitalik-buterin-gives-thumbs-down-to-cross-chain-applications