Perl's lack of 'in' keyword

[Jonathan Stowe]

2008/10/10 Andy Wardley <abw at wardley.org>:

>
> It's certainly easier on the eyes than this:
>
>   C ?? X !! Y            # Perl6 - not yummy
>

What's wrong with the existing syntax for the conditional operation?
Or is this the "Protocols of The Elders of Zion" version of the Perl 6
syntax ;-)