I am irrationally high on Smart. This guy is high-floor, high-ceiling.
He has one NBA skill that is already unquestionably elite, so he will at least be a capable starter.
But he also has an incredible physical advantage at his position, so if he improves on his weaknesses, there is star potential there.
The one thing that makes me believe it is his mentality. I don't think I've ever seen a first-year player who has the maturity, leadership, and competitiveness that Smart has for as long as I've been supporting the Celtics. he is a player with a truly unique mindset. That doesn't guarantee success, but it's definitely a point in his favor.