He is simply the most complete Mr. Olympia ever, being the first to bring massive, ripped armpits to the Olympia stage. Years from now, when all bodybuilders sport bulging armpits, we will look back on this historic Olympia as Derek was the first to bring such well conditioned pits.
Similar to Doz in 93 or Ronnie in 03. Every generation has that one legend who takes it to the next level and in 23 it was Rumsfeld.