Modernization without freezing the business

Big-bang rewrites fail for social reasons as often as technical ones. The business cannot wait, and the old system keeps receiving urgent change.

Strangler patterns work when boundaries are explicit, dual-run is planned, and each cutover earns trust with evidence.

Start where pain and risk intersect — not where the architecture diagram looks nicest.

Each slice should deliver user-visible value while reducing dependency on the legacy system. Invisible refactors alone rarely earn organizational patience.

Measure cutover readiness with production signals: error rates, latency, data parity — not checklist completion.