Embiid is out for the rest of the year, Simmons misses the whole year, Nerlens is traded, and Philly has to keep Okafur just in case. All the suffering and tanking and look what they have.
Note also that former MVP Derrick Rose is not in high demand and he did not save Chicago.
A consolidating trade by the Celtics would be very risky. Trading 3 players and a high pick for Paul George is one achilles or ACL from wasting almost all of the Celtics built up assets.
The paper GM's and the fantasy league guys complain about Ainge not making a trade: but they forget that basketball is played by flesh and blood, not by names.
Red Auerbach said that no one would ever win 8 championships in a row in the NBA because the more modern game has more injuries. I think he is right.