So, accepting the spurious comma at the end of the list and not requiring commas when there's a newline can coexist. I would say they are tho orthogonal properties. You can support the latter without opposing the former.
Sure, but that’s not what the linked article discusses. It specifically states that commas are mandatory on each line. Not that the rule for commas is relaxed. And what I’m arguing is that requiring commas on each line is pushing the syntax in the wrong direction.
