My point was more that a company that makes an operating system probably puts it's best devs on the software for that OS. Further, there is probably not a lot o

My point was more that a company that makes an operating system probably puts it's best devs on the software for that OS. Further, there is probably not a lot of institutional knowledge of the other supported os. Lastly, there is probably some difficulty in getting good applicants with ".Net guys, come work at Apple", or "Objective-C dev? MS is hiring!". It reads like "come work for the enemy".