Too little too late. A couple of trillion $$ and ten years late. Too little in that we got a corpse instead of a captive, when there was an opportunity to take him alive (or “mostly dead” if you get the reference).
In all, we got more of a PR stunt than an actual historical event. Why? A trial could be cathartic and that is dangerous. It would reveal the gap between demonization and reality. It would also deflate the fear bubble.
Fear was/is so useful in making the defense and homeland security dollars flow (at levels beyond reason) and perpetuating the government's emergency powers.