RENTON — Remember the 2010s? It feels forever ago. At least in these parts, that decade in football terms was defined by an acronym — L.O.B. — a Skittles-loving running back, a few angry wide receivers, a quarterback that reminded us all that the field width is 53 1/3 yards and a championship. To this day, still the only title. In the broader perspective of the NFL, the rivalry between the Seahawks and the 49ers for the better part of those 10 years were meaningful chapters in telling the story of what the 2010s were like. They were teams filled with star players whose stories transcended the football field, coaches with a contentious history, meaningful regular-season games, singular plays...