Why Trae Young should want this: We all know that the Hawks by the day, are wasting Trae Young's prime. With this trade, he joins a young team with Gafford that has a shot at competing in the playoffs in a couple of years. A title.
Why the Hawks do this: The Hawks start over. Not fully, though. With the three first-round picks, they can now, if they want, with a package of Jalen Johnson, go star hunting. I would much prefer they just start over with JJ, Dyson, OO, and whatever picks they get from the players they get from Dallas/Brooklyn, they can also flip P.J. for a first, and same for Claxton, which would net them a total of 5 first-round picks for Trae. Better than what Dallas got for Doncic.
Why does Dallas do this: Nico is on the clock. He's got 2-3 years to get it together, or he will become the most hated man in Texas. With this trade, he gets a great wing in Cam Johnson that can fit with Kyrie (when he comes back) and AD.
Why the Nets do this: We all know that the Nets have pipe dreams about Giannis, Jokic etc. Let's be realistic and bring a star to Brooklyn who is one, knows how to win. Two, a guy who makes his teammates better. And best of all, you have a shot at pairing him with Cooper Flagg or Ace Baily. In 2-3 years, Nets would be making some Noice.