On October 20th, Vitalik Buterin replied to netizens on X: "I have been talking about the need for (L1 and L2) lightweight clients for years. I think the solution will come when @NoahCitron Helios (or alternative) makes a handy javascript library to handle these things that wallets can easily import. In addition, it is important that the configuration (config) of L2 is moved to the chain, as this will make it easier for the lightweight client side proof-of-state verification function to be part of the configuration, making it possible for the generic L2 lightweight client side.