They said the same thing about Sir Matt Busby, I assume. This period is shaping up exactly like it did after Sir Matt retired, with a serious lack of direction and focus at the club. I hope the nearly two decade long period of malaise isn't repeated, but I'm not feeling too optimistic at the moment.
Liverpool are still waiting for their next Shankly or Paisley. Still it's easier to stay on top now because of the money in the game, especially among the wealthiest teams - if this were the 1960s or 70s, losing Ferguson could very well have resulted in relegation for Man Utd. As it stands, Man Utd are essentially immune from relegation, even if the league title seems a long, long way off at the moment.