Objective-C is inefficient to develop in. I ported my app from Objective-C to Titanium, and there was no loss in speed or functionality, only wasted developer time. I am reasonably sure I can write comparable javascript ten times faster than Objective-C.

On top of that, Objective-C isn't a portable skill. It's pretty much only used with Apple products. They should really drop this old, crufty NeXT baggage and develop something that doesn't suck to work with.