Ethereum co-founder Vitalik Buterin shared insights following the RWC conference, emphasizing a shift from seeking use cases for Ethereum to viewing it as a technical tool. Buterin highlighted Ethereum's primary value as a "public bulletin board," offering censorship-resistant data availability for various crypto protocols. The recent PeerDAS upgrade has increased its capacity by 2.3 times. Additionally, Ethereum's role in spam-resistant API payments, Sybil attack prevention, and as a smart contract layer for security deposits and digital object pointers is irreplaceable.