I agree that much of this is tribalism that exists in other parts of our culture (Ford vs Chevy, etc). However, in the 1990s, at least on the Apple side, it felt like we were fighting to hold on to resources that would go for supporting our platform. Developers, understandably so, were leaving the Mac. The web as well as many other historical changes that readers of this website are familiar with changed the conversation. Though I do not think platform fanaticism is justified or helpful, does this behavior stem from a legitimate issue, even if now it is a historic footnote?