The video of the audience heat he is taking for those decisions and how he goes justifying his decisions is worth watching for anyone that needs to go through something similar.
Though he did notably compromise on Carbon. The early plan was Cocoa/App Kit all the way, which meant a fundamental rewrite of all the important applications, namely Adobe and Microsoft stuff.
The video of the audience heat he is taking for those decisions and how he goes justifying his decisions is worth watching for anyone that needs to go through something similar.