&gt; I still don&#x27;t understand why MS keeps wasting energy on implementing ES.next features in their transpiler when there&#x27;s already an established modular open source solution available.<p>Isn&#x27;t this like asking why there still are people &quot;wasting energy&quot; on promise libraries now that several well-established ones exist?<p>Isn&#x27;t it good for us developers to have more choice?