Well, I wouldn't do that for hundreds of machines. But for a lot of
people, including technical folk, they can't remember large numbers
of pw's, which presents an interesting problem. If one takes the
approach of having one pw, it should be changed with some frequency.
I agree that an entity is in big trouble if someone gets a root type
of password, but I'll bet most organizations are safer off overall
with one complex password than a mishmash of other simpler pw's where
some of them are taped to machines, etc.