Part time pedant here - been off duty for some time.
When I was young I was taught that the word "and" replaced the need for a comma.
However, I find it is some times useful if, for instance, the last item in a list has two words, such as "fish and chips"
Thus: "Pie, peas, and fish and chips"
On the whole, it's not a usage I would criticise.
I do use more commas than many do, which I find helps the understanding of complex sentences.
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