You know, MA, my father was/is a writer and he schooled us on the UK old way, so that's the way I write... you know, you take a breath, you insert a comma...(and he was against ...s and ---s, by the way...which I use profusely and indiscriminately).
Language usage, grammar, everything's changing, as it always has and willk, but when I read something without that last comma, I have to redo it in my head to make sure I have it right.
I learned to never start a sentence with a conjunction, but it's done all the time by all sorts of people. I do it, myself, but I still think it's "wrong"