Promise or async/await?

async/await is syntax built on Promises, not a separate asynchronous mechanism. It makes sequences easier to read and lets you handle errors with try/catch.

const [profile, notifications] = await Promise.all([
  getProfile(userId),
  getNotifications(userId),
]);

In practice: I use await for a readable flow, and Promise combinators to coordinate independent operations. Promise.all rejects on the first rejection; allSettled gives the status of every operation.

Pitfall: two awaits in a row needlessly add up the time if the operations could have started together. Rejection of Promise.all doesn't cancel the other operations by itself.