Browser wars are almost as old as the internet. There was even a time when people would put little rectangle animated gifs at the bottom of their websites saying things like "Best viewed with Netscape!" or "MSIE SUX!" or "Best Viewed with MSIE!" and then after a while those evolved into memes and then they vanished. There would be flamewars on Usenet about which browser is better. It isn't just browsers. There's tabs-vs-spaces. Scripting language vs scripting language. Meat vs plants. I think this would be best answered by a psychologist. I am curious what the personal preference wars will look like in another 20 years. Maybe "Real human skin vs. synthetic skin on my LoveDroid!"