People always take OS criticism personally. Some more than others. You could switch out Mac for Windows or any other platform and it wouldn't matter. I think he's just using OS X as a point of reference because it's what he uses. Yeah, I could see a little bit of taking your comment personally in there but he still makes a good point. Furthermore, your attack of Apple seems just as much like a justification for your own choices as anyone's defense of any platform seems like a justification of theirs. It's really hard to not take this stuff personally, especially for developers, because our choice of platform becomes part of our identity. I don't know of any other profession where you get so close and attached to your tools; choosing them, configuring them, getting an efficient workflow down. I always wondered why we get so religious about our choice of technologies but after realizing this it's not hard to understand anymore.