Nick Mallett's argument is straightforward but worth examining: the reason Erasmus can rotate freely without performance dropping off isn't squad size or raw talent — it's that every player, from the first-choice starter to the fringe squad member, operates with identical positional clarity. Mallett uses the loose-forward and flyhalf channels as his examples — whether it's Du Toit or Louw at seven, or Pollard, Feinberg-Mngomezulu or Libbok at ten, they're all executing the same game plan from the same positional blueprint. He credits the alignment camps and the deliberate use of second-string line-ups against quality opposition (Scotland in July, Australia in 2024) as the mechanism that built this understanding deep into the squad. The practical upshot: Mallett says he feels no anxiety about whoever Erasmus fields, with the only caveat being match fitness for those returning from injury ahead of Saturday's clash in Buenos Aires.