Hey I'm the author of the article. I created a library of modules that were reused across single page apps. For individual libraries I agree it doesn't make sense, but not enough people take advantage of the module system
I can't find the exact article I read where the authors discussed this, but I did find a presentation by Brian Ford[1] that touches on the subject.
[1]https://docs.google.com/presentation/d/1Gv-dvU-yy6WY7SiNJ9QR...