Woah woah buddy, when did I ever say he doesn't know the game of football? Please don't put words in my mouth. That is intellectually dishonest.
I perfectly know all that (re: Purdue) but guess what? 1) it was Tiller's system and 2) he has since abandoned parts of it. Did you know that?
By the time he got to Arky and Pitt he was noting how at Purdue they were the odd balls for running spread and now he was an odd ball for going back to pro style. Research yourself - he said this. Was what he ran at UGA innovative or modern? Go ask any fans. Heck, he ran on ~66% of 1st downs, exactly what we all griped about last year.
He's not uptempo, he's hardly spread anymore, doesn't utilize a DT qb game, he thinks RPO is "not all that", so yes, antiquated.
Look to UF to see what a more modern offense is capable of. Took a garbage OL and QB and turned it into 36 ppg this year - matching Chaney's PEAK season here...in year 1. I'm just saying, there are better offensinve systems out there to score with these days.