Porzingis is a highlight reel when healthy, with an array of dunks, put backs, low post moves, 3-pointers, blocked shots, etc, he can do it all. But health and durability is a concern, especially so early in his career.
Some 7-foot plus guys tend to have lots of ankle/foot issues, those joints just can’t handle a body that size and the rigors of NBA basketball. But there are also those like Nowitzki, Ilgauskas, Rik Smits, etc, who have had long, productive careers. Porzingis may never play 82 games, but if he can fully recover from his ACL injury and get back to all-star form, he and Doncic could form an incredible duo that can lead the Mavs to championships.
With Luka, you can see very clearly that he can lead a team, he’s a legit #1. I always got the sense Porzingis is more of a #2 guy when talking about needing to have 2 stars on your team to win titles. This trade could work very well in the long run.