Trading for Kevin Durant is the kind of move a team whose window is closing makes. It's a bit of a hail mary, something a young team that just missed a title by 2 games should not be entertaining.
Durant will be 34 before the season. He's missed more games the last 3 years than he has played, by a wide margin. Even being almost 2 years past the Achilles injury, he missed 1/3rd of last season. Anyone who buys him should do so knowing there's a good chance he's going to miss a big part of the season, and a much higher than average chance he won't be 100% for the playoffs. Those things don't improve at 34, they get worse, and Durant is not the physical specimen Lebron is.
We're watching Brad Stevens destroy in slow motion the team he and Danny Ainge have spent the last 6 or 8 years building. What a cluster.