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@nathanalbert@mastodon.online Not rigidly, though. Very much case by case, based on readability.
@Karen5Lund @nathanalbert@mastodon.online Exactly, as soon as a list is more than one word, an Oxford comma helps readability enormously. (And the way I write, that happens a lot)
I don't like them so much for single words. But if everyone listened to me and used semicolons for separating out lists, we wouldn't need to have this debate. 
@Spinybadger @nathanalbert Agreed. I find it especially necessary if the items in the list are of more than one word. A simple list of one-word items can go either way--but an Oxford comma is never wrong.