Wu said that Paradigm CTO Georgios Konstantopoulos revealed after a year of research that account abstraction doesn't require major breakthroughs and suggested it should have been an Ethereum native feature early on. Vitalik Buterin responded, stating that full account abstraction hasn't been achieved yet, requiring either ECDSA or intermediaries. However, intermediaries pose risks to privacy, censorship resistance, quantum security, and privacy protocols still face challenges.