As someone with experience in the matter, teccum's point #9 is very much true. And I might add, despite the desires of management, one single tool is NOT going to solve everyone's problems. BO, Impromptu and Microstrategy have been accused of being "too complicated" by some users (Marketing) where Brio is loved. Brio is accused of being too simplistic by other (Accounting, Operations) and they want one or more of the others.
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The reasonable man adapts himself to the world. The unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. - George Bernard Shaw