The reason is that they can hire from a massive pool of developers and target Mac, Windows, and Linux all with a single application and UX. I always found writ

The reason is that they can hire from a massive pool of developers and target Mac, Windows, and Linux all with a single application and UX. I always found writing Cocoa-based code to be surprisingly elegant. The only thing that ever felt weird was having to switch back and forth between Project Builder and Interface Builder. In any case, there are a lot of things that are hard to build and also have great, coherent sets of tools to build them. Erlang comes to mind.