One benefit of the old approach (repeating the lines in individual bundles) is that no additional requests were needed.

Maybe a middle-ground would be best, where we could add assets to existing bundles without copying the lines. I started writing a function to do this for the `mdn-screen.css` migration, but ultimately gave up, deciding it was not worth the time. But this use-case keeps coming up, so maybe it would make sense for us to revisit it.