> Are you serious? Since the invention of structural programming,
> creating a separate module for distinct functionality has been one of
> the most powerful design techniques.

Yes, I'm serious, and I don't see what structural programming or design
patterns have to do with it.

And we're not even talking about "distinct functionality", we're talking
about the exact same functionality, except that the return type has
slightly different implementation characteristics. Doing a module split
is foolish.