Conte was a key figure in the resurrection of Juve, along with the owners, management and the players. In Contes first year he had Buffon, Bonucci, Barza, Chiello, Licht, Pirlo, Marchisio, Vidal and had the advantage of only playing once a week. So basically he had a WC goalkeeper, defense and midfield and a below par attack. The next year Pogba and Asamoah was added the following year Llorente and Tevez. Except for the first year he had the best squad in Italy so he hardly pulled of any miracles winning the scudetto 3 times in a row.
I think Conte did great here, but stating that he will be a key figure in the next 50 years of Juves history and comparing him to a man like Crueff, who changed football as a coach and a player, is a massive overrating of Contes impact for Juve and football in general.
In the next 50 years we will have ups and downs, but what will make us a winning time in general in those 50 years, is the winning mentality and history of the club and not Contes 3 year coaching of the club.