Eh, it took me a long time but I've gotten out of using it. When I was on Tinder, two different girls listed "the oxford comma" under their likes. I went on a couple of dates with one of them and she said she didn't know the other girl. She thought she was so clever and original putting that.
You use UH comma because you didn't have the grades in high school to use any other commas, not because you couldn't afford it.
Thats the only area I've seen mention of Oxford comma. By women being all snooty with their "qualifications" lol. Its not all uppity chicks obviously.