You may regard it as rubbish but even Wenger has said it. Allardyce in an interview a couple years ago has said it. I'm not speaking based on feelings, these are comments made by managers. Gone are the days where you can't think tactically. Neville, Keane, Ole, have all said that Fergie wasn't a tactical manager, and they HARDLY ever did tactical drills. Fergie just had an unbelievable knack in getting the best out of a squad of players and it's why he'd always be regarded as a top-quality coach. These days, you can't just 'get the best out of players". You need to look at data, stats, tactics of your team and the opposition, along with other factors that affect the team on the pitch. Am I saying that Fergie would not have been able to adjust or adapt to modern day football, of course not. But Guardiola is just on another level when it comes to his understanding of the game.