I’ve not been exposed to this discussion first hand (yet). This might be because the serial comma is tolerated and even expected in much of the U.S., so maybe I need to hand with some British writers.
Usually, I do err on the side of the serial comma, but at the same time I don’t feel that this is something I get hung up on. Unlike unnecessary quotation marks, the Oxford comma (or the absence of) isn’t something that’s ever rankled me.
What about you? Is the Oxford comma an issue for you? Feel free to share in the comments below.