Promise.all

A later .then receives the wrong value, an error appears in a surprising place, or a batch fails differently than expected. Use `Promise.allSettled` when you need every result, including failures.

Expecting partial successes to continue to `.then`.

Return or await the promise chain so values and failures move through the flow intentionally.

return doWork()
  .then((value) => nextStep(value))
  .catch(handleError);

The console lane proves the visible order: fail. The active line and queues show why source order changed.

Write a focused unit test that asserts the resolved value or rejected path, then verify every branch returns or awaits its work.