Victor Matfield and John Kirwan have unpacked the significance of Tony Brown's confirmed move from the Springbok coaching staff to the All Blacks in 2028. Kirwan is broadly relaxed about it — his view is that modern rugby has converged enough tactically that coach-swapping between rivals carries less strategic risk than it once did, and he credits Brown's real value as his ability to build player confidence rather than any proprietary system. Matfield is more nuanced: he draws on the Gert Smal precedent to acknowledge that Brown will carry genuine insight into how the Boks think, but argues the knowledge transfer runs both ways — by the time Brown leaves, the Springboks will equally know how he approaches attacking play. Matfield's headline assessment is that Brown's biggest contribution has been sharpening in-the-moment decision-making under pressure, which he frames as less about a fixed game plan and more about player awareness and execution. Both men broadly back Erasmus's transparent approach to long-notice departures, with Matfield pointing to the Nienaber and Jones precedents as proof it needn't derail World Cup preparation.