My 4 year old granddaughter loves this movie. We had an old copy on VHS that she used to watch. When that got broken, I told her I'd find another just for her. When she's at my house, she has to watch the WIZ. She dances and sings along with every song.
It's hard to do anything in court that hasn't been done before. It's a static situation, and points are scored in tiny increments. No big witness-stand breakdowns, no tearful confessions. Thus, boredom creeps in.
The plot that Paddy Chayefsky has concocted to prove this point is so crazily preposterous that even in post-Watergate America -- where we know that bats can get loose in the corridors of power -- it is just impossible to accept.