Show HN: Operations.js – Manage async operations in Node and the browser

I would ask : What is the benefit of operations.js vs promises?<p>Similar to the examples you can easily do :<p><pre><code> promiseA.then(promiseB).done( ... )</code></pre>

I don&#x27;t see any new features that wouldn&#x27;t be possible in async. Am I missing something ?