Despite now being 33 years of age, the Portuguese superstar remains one of the most recognisable and fearsome frontmen in world football.
For that reason, the reigning Serie A champions were prepared to spend big bringing the five-time Ballon d’Or winner onto their books this summer.
Ronaldo’s sporting and commercial appeal remains without question, but Platini was still surprised to see him swap a standing as undoubted team talisman in Madrid for a fresh start in Turin.
The ex-France international, who spent five years with Juve during his playing days, told L’Equipe : "I think it's odd that at 33 years of age he's left 'his' Real Madrid, with whom he has won three Champions Leagues in a row, to try a new adventure.
"When I was 32 lots of teams wanted me, but I retired because I was tired."
Few at that stage expected a deal to be put in place, with a modern day icon having just completed another goal-laden campaign in the Spanish capital.
It has been revealed by Ronaldo that Juve were the only option made available to him, despite there having been talk of a possible return to Manchester United or a switch to big-spending Paris Saint-Germain.
Platini was questioned how the switch to Turin was put in place, with it possible that a move was led by agent Jorge Mendes rather than the Bianconeri.
He added: "I can't understand the move.
"I do not know if Juventus has contacted him or if it was Mendes who offered him, I cannot understand this operation."
Having linked up with Juve, Ronaldo is still waiting on his first competitive goal for the club .