Ethereum founder Vitalik posted that "the best way to build L2 is to make more use of the capabilities provided by L1 (security, censorship resistance, zero-knowledge proofs, data availability, etc.), and simplify your own logic to only handle core execution as a sequencer and prover (if it is a based design, only a prover is needed). This model combines 'minimum trust' and 'efficiency,' which is a goal that enterprise-level blockchain teams in the 2010s pursued but never truly achieved. Now, through Ethereum's L2 solutions, this goal can be achieved. In fact, we have seen some successful cases: when problems occur in L2, the functions of L1 successfully protect the rights and interests of users." [ChainCatcher]