[patates]

You can't have generic functions that can wrap data so you end up passing concrete models or interfaces to views - no generic view-models for you. The inflexibility of the type system isn't a big deal when you are working on network applications or tools, but causes serious duplication when you do anything that passes around concepts internally.

[bsaul]

i don't think generic is relevant to GUI. objective c didn't have generics, and i don't think it mattered in any way when they built cocoa.

now generics is a problem of its own when working with data and algorithms, but they managed to get along with it in the backend so far, so...

[dagi3d]

obviously it is doable, but that does not mean there aren't better solutions today.