Why the Warriors do this?

They are in win now mode, especially since Curry looks like an MVP again. They don’t have the time for the young guys to breakout or develop. Adding Sabonis, easily, pushes them to the top tier of teams. Morris is also another great playmaker, that they desperately need, to add for the bench

Why the Pacers do this?

They need to rebuild. Their current core isn’t working together, they are all great players, but it just doesn’t work. Trading away Sabonis kind of hurts, but they get a really great, young return from the Warriors

Why the Nuggets do this?

They need a SG for the future and Moody is a perfect player to fit in with the the Nuggets core.