A data pipeline is easiest to judge when the source changes after the first load. For an Airbyte comparison, choose a real source-destination pair, run an initial sync, then add, update, and delete records. Interrupt one run and see whether the next completes without duplicates or gaps.
Check schema drift, cursor behavior, credentials, failure alerts, and how much operational work each connector needs. Reconcile row counts and key fields, but also compare timestamps and transformed values. A candidate with many connectors may still fail on the one incremental path your reporting depends on. Keep the old pipeline until the destination is independently validated.
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