Choosing a Language — Senior¶

Adoption creates build, security, observability, hiring, review, deployment, and upgrade obligations. Prefer a service or serialization boundary for incremental adoption. Define ownership, supported versions, dependency policy, incident support, success metrics, and an exit path before rollout.

Model total cost: implementation speed, infrastructure, failure recovery, ecosystem gaps, migration, and years of maintenance.

Test yourself¶

1. What is the smallest reversible adoption boundary?
2. Which team owns runtime upgrades?
3. What metric triggers expansion or rollback?

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