Recently, I have experienced several L2 and L1 testnets and online testnets that have not yet issued coins, including zksync era, scroll, starknet, sui and sei. The overall experience is that as a new public chain L1 and sui that have raised a lot of money, It is slower than sei, has a poor experience, and does not look like a new public chain at all; zksync speed is acceptable, but the cost has far exceeded the existing#opand #arb, and starknet is the slowest in L2, with a medium cost. On the contrary, the scroll experience of Chinese projects is the best, with fast speed and very low cost. If it can still be maintained after it is officially launched, then scroll will have an impact on existing L2 projects. I have a rough idea of ​​what to focus on when brushing projects. .