<p>Odaily News Vitalik Buterin said that centralized sequencers actually have many advantages:<br/> * A centralized sequencer can ensure that it will not steal users’ money by frontrunning or other means;<br/> *instant preconfirmations;<br/> *It is easy to turn a traditional application into a blockchain application because the server directly becomes a sequencer.<br/> The decentralized nature of blockchain can be used to avoid the risks of centralized sequencers: the forced inclusion mechanism prevents the sequencer from censoring users, and the optimistic or zk proof mechanism prevents the sequencer from changing or violating the application rules (for example, suddenly inflating a token or NFT collection).<br/> However, centralized sequencers still have risks, so we cannot rely solely on centralized sequencers to solve the problem. The ability to trade based on rollup or directly on L1 is also important. So I support the two-part ecosystem to promote these two methods at the same time, and then we can see which method is more suitable for which application. Maintaining the ability of ordinary users to issue censorship resistant transactions is of course critical.</p>