Promise.withResolvers can fill this gap now (though it's not natively available in Node, yet):

  function sleep(ms) {
    const { promise, resolve } = Promise.withResolvers();
    return setTimeout(resolve, ms), promise;
  }

Doing multiple async tasks concurrently as opposed to in sequence. If you have never used this you have either worked on extremely simple systems or have been leaving a ton of perf gains on the table.

I often map a series of X to Y with Promise.all. For example, mapping a series of image URIs to loaded Image elements.

It is shorter to write than a for of loop, and importantly, all images will be loaded in parallel rather than sequentially, which can be significantly faster.

  images = Promise.all(uris.map(loadImage))