For 76ers, Getting off Embiid contract a year early. People may say it is not worth to get AD, but Embiid is literally the same thing and AD contract is shorter and a better player. For Mavs, 28 first and 30 first and McCain are valuable assets, they can try to lay off Embiid's contract like Bucks or finding market for him if he can get a good stat line in a tanking team. 2 lottery pick and a future possible all-star guard is the reason for them to do it.