Perspectives
Modernization, release planning, operational continuity and recovery.
Modernization
Begin by understanding what must keep working. Business rules, downstream integrations, data semantics and recovery requirements shape a safer modernization sequence.
Read the perspectiveDelivery risk
A rollback plan is a design artifact. If it is written after the migration starts, it is usually a wish rather than a plan.
Read the perspectiveModernization
A rewrite is justified when the current design cannot support the business rules you must keep. It is a poor answer when the problem is only delivery pace.
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