Vitalik Buterin tweeted that Layer 2 (L2) technology has finally become affordable, which is the key to popularizing decentralized finance (DeFi). Robert Sasu, a core engineer at MultiverseX, responded that L2 is currently only cheap in a centralized environment. Vitalik disagreed with this view and pointed out that Taiko is a decentralized based rollup solution, indicating that the fees of decentralized L2 such as Taiko have reached an affordable level. Sasu agreed and also emphasized the importance of based rollup, but added that rollup-based solutions are still in the minority and hopes that more projects can migrate to this architecture.