Simplify all Error handling if all errors implement Show

[gmlewis]

Currently, Error represents an error where no information can be extracted from it unless it is pattern-matched explicitly against a known collection of possible errors. (Please correct me if I'm wrong.)

What if Error and all custom error types created by type! were forced to provide a to_string method so that no matter what kind of error happens, information can be shown to the user about the specific error?

Wouldn't this dramatically simplify all error handling by enabling all functions that might error to simply return T!Error and then at some point up the call chain the error can be handled and to_string() can be called to report the error?