Correct me if I'm wrong, but pre-OS 4.0 the agreement did not say anything about which languages you should be using. Xcode might have been the only officially

Correct me if I'm wrong, but pre-OS 4.0 the agreement did not say anything about which languages you should be using. Xcode might have been the only officially supported IDE, but that's about it. You could say one shouldn't have trusted Apple not to screw others over, but that doesn't really help the ethics argument at hand here. Take out the job offer from bigcorp from my example. You're still going to have to invest in hardware and probably ramp-up.