And so the great Manchester United debate continues.
Now Jamie Redknapp is the latest to have his say - and he has offered a damning verdict on United's current squad.
Indeed, the former Liverpool midfielder believes that, with Wayne Rooney, Robin van Persie and Michael Carrick all out injured, even Ferguson himself would not be able to turn this United team into a winning one.
"Two seasons ago they didn't win anything and Sir Alex Ferguson went out and bought a 'game changer' in Robin van Persie who fired them to the league title," Redknapp wrote in his Sky Sports column.
"But if Ferguson was still the manager now and he didn't have Wayne Rooney, Van Persie and Michael Carrick available, which is the situation Moyes has been in, United wouldn't win any trophies.
"When I used to go to Old Trafford as a player, you'd stand in the tunnel and think 'wow, they've got players who can win this game here. Not just one, not just two but five or six.
"That's the difference. I don't look at United now and see five or six options that can beat you."
Redknapp does apportion some blame to Moyes and the Manchester United owners, however, for their handling of the summer transfer market.
While United could have avoided their current problems by buying wisely, the ex-Liverpool man claims, their eventual decision to buy Marouane Fellaini proved a "panic buy" that has done Moyes' side no favours.
"In the summer, United had an ideal opportunity to go and get a couple of big names in but, out of all the players they could have signed, they ended up with Marouane Fellaini. He's not a bad player but he's not a Manchester United player.
"It was a panic buy but when you spend £27m the owners will look at that and think: 'that's not ideal, that was Moyes' first effort in the transfer market at a massive club and it's been a failure'. It wasn't like signing a Van Persie or a Cesc Fabregas."