Inventory managed-service dependencies by replaceability: compute and storage move easily; proprietary databases, queues, and identity integrations are the real anchors.
Skipping managed services to stay 'portable' usually costs more than it saves. Instead: isolate vendor calls behind interfaces, keep data exportable, document the seams.
A living document pricing the move — target architecture, data-migration path, dual-run plan, and effort estimate — refreshed yearly and before every renewal negotiation.
Acquisition mandates, pricing shocks, and regulatory shifts — rarely voluntary, always urgent. The runbook converts panic into project.
Skipping the discipline this article describes until an incident, audit, or stalled project forces it — every practice above is cheaper adopted early than retrofitted under pressure.
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