It’s surprising and interesting that people have such strong opinions about it. Here’s one explanation from comma supporters: The Oxford comma is the difference between “We invited the strippers, JFK, and Stalin” (3 attending the party) and “We invited the strippers, JFK and Stalin.” (2 attending, and both are strippers).
I used to be a newspaper reporter and Oxford commas were banned — as a means of saving money on ink. Since space on the Internet is infinite, I guess we now have the luxury of using them.
But I think it’s too late for me…
As long as no one’s banning the exclamation point, I’m happy!