I wouldn't be so dismissive of ENWorld's fan base. Somewhere out there is someone who went to West Point or something, and could tell you all sorts of combined arms, special unit, air support whatever tactics that Julius Caesar never conceived of. Give Caesar and that ENWorlder equally armed and trained troops, and I'd bet on the modern guy.
The ENWorlder also has the big advantage that Caesar kept extensive notes, from which a lot of the more modern stuff is derived.
It's the same in many, if not most fields: Newton was a genius, but the theorems that he spent years struggling to develop and prove are now taught in high school - we get to "stand on the shoulders of giants", of which he is one.