After South Africa’s stunning 3-1 series win over New Zealand, the rugby world was still catching its breath when Jeff Wilson stepped in with a sharp and unexpected message. The former All Blacks winger argued that the Springboks may already be close to their ceiling. It was not a criticism of their power, their discipline, or their status as one of the most feared teams in international rugby. Instead, it was a challenge to the idea that Rassie Erasmus can still make this side dramatically better.