The answer
Best-effort data fetching (dashboard widgets that may fail individually), partial success scenarios, and when you want all results regardless of failures. Some widgets fail, but the page still loads with available data.
Promise Combinators: Real-World Examples in JavaScript
What are real-world use cases for Promise.allSettled in JavaScript?
More FAQs in Promise Combinators: Real-World Examples in JavaScript
Loading multiple resources in parallel (user, posts, friends), fetching multiple pages, parallel data transformation, and batch processing with limits. Any scenario where you need all results and any failure is a total failure.
Timeouts (race an operation against a timeout promise), first successful source (whichever responds first), and cancellation patterns. Common for API calls that should not hang forever.
Fetching from multiple mirrors (use whichever responds first), fallback APIs (try multiple, use first success), and redundant data sources. If all fail, you get an AggregateError with all reasons.
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