EU Warns Q-Day Could Arrive Before Quantum Computers Are Commercially Useful

The framing is the story: Brussels is decoupling quantum risk from quantum commercial viability, which means the migration clock starts on policy timelines rather than hardware roadmaps. That shifts pressure onto whoever holds long-lived cryptographic exposure — financial infrastructure, identity systems, and blockchain networks with immutable ledgers are the obvious candidates, since retroactive decryption is the concern, not present-day capability. The end-2026 planning deadline is the nearer signal than any Q-Day estimate. Whether member states treat this as an inventory-and-triage exercise or a funded migration is the open question.