Most AWS migration projects don't fail because of technical complexity. They fail because teams treat migration as a single activity rather than a set of distinct strategies applied to different workloads.AWS defines seven migration strategies — the 7Rs — that determine how each application moves to the cloud. The decision of which strategy applies to which workload has more impact on project cost, timeline, and outcome than any architectural choice you'll make after. Yet in practice, most teams default to "lift-and-shift everything" without evaluating whether that's appropriate.