I'm a Monorail freak, but I still love the buses - purely because they're effecient. The Disney Monorails are only out of date because they're old and slow and subject to human error. Newer monorails and other elevated trains and subways are effecient because they're entirely computer controlled and fast. When you let a computer control the dispatching, you get a streamlined system that can move people like nothing else. If they applied this to the WDW system, they could nearly double the number of trains on the lines, allowing them to run closer together. The only setback is that the users of the trains (the riders) have to be quick, and pay attention (which we all know does not apply to all of WDW's visitors :lol: ). Subway riders are "trained professionals" when it comes to riding, but not everyone at WDW has ridden a subway, and can't always be prepared to cram on the train before the doors close.
Oh well, until they master that system, the buses are quite sufficient for moving people. They're the best thing they've ever implemented, in my opinion.