Things are different now, as several teams have developed and improved their teams. It must also be acknowledged that Serie A competition has become much fiercer, making it difficult for Juventus to compete and win titles like they once did.
Honestly, I'm still skeptical about Juventus next season, as they haven't built their team or made any significant changes, so their performance likely won't be significantly different.
Of course, the competition has become more competitive since the arrival of Inter Milan and Napoli, who have consistently developed faster and have better financial support.
Perhaps this is the exact reason why some, even you, are skeptical about Juventus' performance next season. Until Juventus achieves financial stability, the club hasn't been able to regain its peak performance and will continue to sell its best players to cover its dire financial straits.
Every season is full of surprises and we might see another next season. Nobody saw it last season that Napoli would be the winner of Scudetto but they surprised us. I believe that same thing might play out next season and a different club might win the title, because some clubs have changed their coach and you don't need to underestimate the coaches.