It is hyperbole.
I should have realized that the way I phrased it was provocative. Maybe people would have responded better if I put more thought into that...
100 is an arbitrary number of course. I gave a few specific examples of UnpackingUnderflowError and MissingArgumentsError, and if I spent 30 minutes on it I could probably come up with 10 more examples. The point isn't the specific example, but to advocate for a general strategy of breaking down exception to as many classes as possible, instead of having this fight over and over again on each exception.