According to Odaily Planet Daily, Vitalik Buterin replied to netizens on X: "The key thing that we are really in the early stages of is that L2 will eventually be affordable. Since 2020, I have been saying that the entire 'not just high-value DeFi' part of the crypto space can only work if transaction fees are cheap. It wasn't until March of this year that they really became a reality. If I were to choose the second and third early areas, they would be: 2. ZK-SNARKs and use cases (zupass, railway, 0xbow, rarimo, etc.) are finally close to maturity. 3. Account abstraction ZK-email (and zk-wrapper similar to centralized ID) is particularly important, connecting the two."