I find them handy because I spend my whole life typing up spoken language, and constructing meaningful lists is something that happens pretty often. Just gives you more options for defining list terms and so on
So, to take an example from that article, I can’t rephrase things in my work to make clear the distinction between, “Lady Gaga, Humpty Dumpty and my parents,” versus, “My parents, Lady Gaga, and Humpty Dumpty,” because if someone says the latter then that’s what I’m writing down! Therefore, the Oxford comma is very useful to me.