Ethereum’s "walkaway test", ossification goals and the push for quantum-safe design

Vitalik Buterin's "walkaway test" frames Ethereum's long-term credibility as its ability to remain secure and useful even if protocol upgrades largely stop. Within this vision, the network must be able to "ossify if we want to" while still handling quantum-era cryptographic threats through account abstraction and flexible signature schemes. The roadmap aims at full quantum resistance, higher scalability, durable state architecture and resilient proof-of-stake economics so Ethereum can adjust its security assumptions without relying on emergency coordination.