The Strangler Fig and Coexistence Architecture
Three years in, sixty percent of features had moved, twenty-three adapters kept the old system alive, and nobody could say which system owned a customer record.
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Transitional Architecture
Temporary integrations can enable earlier delivery. Their purpose, consumers, operating cost, recovery obligations, and removal conditions need management.
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Strangler Fig
Moving capabilities is only part of replacement. Plan intermediate contracts, data authority, recovery, and the dependencies that must end before retirement.
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Migration, Modernization, and Transformation
The program moved three hundred servers to the cloud in fourteen months and called it transformation. Two years later billing still changed once a quarter.
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Lift and Shift
Rehosting preserves application design, but infrastructure, responsibilities, and costs can change. Verify the move and reassess application problems.