&gt; There are a lot of one liners that are much more composable in the fat-arrow syntax. The default returns takes a lot of it out, and makes it simpler the simpler it starts.<p>They’re not more composable… they’re <i>slightly</i> shorter, and anything non-trivial doesn’t fit on one line. Template literals are nice, sure.<p>&gt; the local name doesn&#x27;t have to match the name of the module,<p>But when it does, everything is a lot more obvious. It works fine for all the Python modules, too.