That's what says in the next line:
"The Switch was among most popular items sold on Black Friday, according to analysts who said that the gaming console benefited from aging competition."
XDDDD, but ok, ok i won't argue with you anymore today....
Yes, it benefited (won) by the others being down. The article refers to placement, not absolute sales numbers.
Also your original argument was that Switch was affecting PS4/XBO and nothing in that article indicates that, it mentions how they are down due to age and upcoming successors, not because of Switch.
When the herd loses its way, the shepard must kill the bull that leads them astray.