Crypto-Agility Matters More Than Algorithm Choice

The post-quantum conversation is dominated by algorithm selection: ML-KEM vs. BIKE, ML-DSA vs. FALCON. While these decisions matter, they miss the more important architectural question: can your system swap algorithms without a rebuild?

NIST's standardized algorithms will evolve. New candidates will emerge. Vulnerabilities will be discovered. The organizations best prepared for the quantum transition are not those who picked the "right" algorithm first — they are the ones who built systems that can change algorithms through configuration rather than code.

This is crypto-agility: the ability to replace cryptographic primitives at the policy layer without modifying application logic. It is the single most important architectural investment for quantum readiness, and it costs almost nothing to implement if you design for it from the start.