The relentlessness of the Premier League means success can only be sustained by evolving year on year.
Sir Alex Ferguson knew this best and always adapted his team accordingly in every transfer window. It could be argued that United have failed to do this since.
On paper, last year’s recruits were supposed to transform the team into title challengers, or at least top four certainties. But this season proved that evolution is not defined solely by the calibre of player a manager brings in, but also by the chemistry they have with the existing squad.