[andrekandre]

  > And it introduces new issues: which methods are being called depends on your imports.

also depending on how you casted it, it will call the method of the cast, not the actual one in the instance (which completely caught be off-guard when i started swift)

  > objc also has lightweight generics. In practice this is all you need.

i feel this too sometimes; sometimes simple really is best... tho i think some of these decisions around complexity is to allow for more optimization so c++ can be chucked away at some point...