It would also trace to when coaches started having umpteen assistants and more tactical focus, who was in the box with Blight during the camry flags John Reid & Darrel Hart that was about it lol.Remember that players were different shapes and sizes back then. Almost all players these days are lean and athletic whereas back then not everyone was a run all day athlete. The switch to drafting athletes over footballers really enabled the sort of tactics we see in today's game.