PANews reported on June 4 that Ethereum co-founder Vitalik Buterin responded to Paradigm CTO Georgios Konstantopoulos's view on the X platform that "cross-chain interoperability has been solved at the infrastructure level" and said that only when cross-L2 operations can be comparable to ETH native transfers on L1 in terms of anti-censorship, trustlessness, and no need for intermediaries, can it be considered "truly solved." Vitalik called this the "no-regression principle," emphasizing that the new system must retain the core attributes of the original system, otherwise it cannot be considered sufficiently complete.