Migrate to Sent Every migration from a major CPaaS provider hits the same five translation problems. Work them in this order, because the first one silently doubles cost and is invisible in tests. 1. Ordered fallback becomes automatic routing Incumbent platforms express cross-channel delivery through different caller-side arrays, failover objects, messaging-service features, or application-level priority configuration. Do not assume those shapes have a direct Sent request-field equivalent. Sent's array is a broadcast list. Porting an ordered array produces one message and one charge per recip…