[eelco]

Very often? Have you seen how many people are still using iPhone 3Gs (not 3GSs!) That's about two and a half years old.

[Locke1689]

I still am. I know a couple people who still are too (the 3G iOSv4 wouldn't have needed an update if the market share weren't significant).

[antimatter15]

I'm still using my iPhone 2G and 3G