Undesired dependency on SystemJS after compilation

[ArmorDarks]

I know it's mostly abandoned but will leave this comment for others looking into.

After importing *.vue file, browser throws an error:

Uncaught ReferenceError: System is not defined

It is possible to workaround by loading SystemJS manually before running bundle.

But I'm not sure it was intended to have a need in SystemJS running in a browser after compilation. Wouldn't it be more beneficial to completely compile the code, so that bundles receive everything ready?