At our university, we have writing styles that require* or discourage** using serial commas (SCs; aka Oxford commas).
I often joke with students that there are three kinds of people in the world:
#1 Those who love SCs.
#2 Those who dislike SCs.
#3 And the vast majority of people: those who don’t know what an SC is and don’t care.
* e.g., APA https://apastyle.apa.org/style-grammar-guidelines/punctuation/serial-comma
** e.g., NZLSG https://www.austlii.community/foswiki/NZLawSG/GeneralRulesMainText#Punctuation