Alex Ferguson is fit to be mentioned in the same sentence as Jock Stein. That is most of what needs to be said on his retirement.
Except to remind that fool Abramovic that Ferguson won nothing for his first four seasons at Old Trafford. I recall in 1990, at the end of Ferguson’s third season in charge, Manchester United just escaped relegation and there were Manchester United fans clamouring for Ferguson to be sacked. The reconstruction of the squad and the installation of his system took time and care. It took a full four years for Ferguson to lay the foundations for the following twenty years of great achievement.
Nowadays managers are not given four months, let alone four years, to mature their designs. There can be no doubt the short-termism of glamour hungry individual foreign owners accounts in part for the relative decline of the quality of Premier League clubs compared to their continental rivals.