The good vibes had to end at some point. The stakes are real for both New York football teams now, with the playoffs feeling within their grasps even after the Giants and Jets both took losses on Sunday. That is why this Sunday felt more painful than the two-loss weekends we’ve grown used to in recent seasons, when both local teams were all but officially playing out the string by now. For the Giants in particular — more on the Jets in a bit — this was a gut-check loss. We know that the analytics pegged their 6-1 start as...