Talk about missing the point.
I KNOW that people who text while driving are idiots, but this thread isn't about traffic safety, it's about exploring why some people insist on having a phone with a physical keyboard. The OP asked why people are "obsessed" with a physical keyboard, and my answer is that at least some of them, about 1/4 to be specific, write SMS messages while driving. Yes, it's a f***ed up habit but that's another discussion -- the fact remains that they are doing it, and ergo, the iPhone or anything else with a virtual keyboard isn't their cup of tea.
I just think it's not fair to say a virtual keyboard is a disadvantage because "it's more dangerous to text on a virtual keyboard when driving than on a real keyboard" when it's not how it's supposed to be used anyway.