I'm one of the about 0.5% of Mavs fans that are excited about the AD for Luka trade. Max Christie was a throw-in in the trade for the Mavs, and he had 15 points 9 rebounds and was the best defender on the floor in his first game as a Mav. I enjoyed "Oncic" and "Irk" for the last 25 years as much as anyone, but it's nice have the "D" back in Dallas. The one year the Mavs won with Dirk, they surrounded him with athletes who could play defense. As to durability, AD has appeared in 118 regular season games over the last two seasons, Luka 92 as of this moment. Luka prefers a Euro-style 56 game regular season, and this isn't likely to change with age.
Now, the question is how much fire does AD still have in him? He's been one of the top 5 players in the NBA this season, and he is still just 31. AD is being completely disrespected locally in D/FW. As I recall, an inspired AD is a joy to watch. If he is hearing what they are saying about him around here, he should be really pissed off.
Side note, Jason Kidd was Frank Vogel's assistant when AD won with the Lakers and Vogel is now on the Mavs coaching staff.