[masklinn]

> Could you elaborate on Point 2? What causes this bug, and how do you fix it?

Unless @async is specified, the scripts linked in a page will be executed in that order. This means it's easy to unknowingly create implicit (and possibly unexpected) dependencies between scripts.

Because a module loader will perform asynchronous loading and execution of scripts, if dependencies are left unspecified the loading order is essentially random (mostly driven by the script's source size and how fast the server happens to respond to that request). A module loader requires that dependencies be explicitly spelled out, or changes are the application will randomly blow up at loading.