When a customer emailed Steve Jobs asking if Apple would support/update the iPhone 2G in the future, Jobs replied:
The move shouldn't come as a surprise considering that the original iPhone came out in 2007 and the launch of a new iPhone handset this summer will make the original a full three generations old. It takes development resources to build and test software to support older hardware and Apple would be better served putting those resources into advancing the platform -- rather than keep old and dying hardware afloat.
But make no mistake about it, Apple also wants to sell you a new iPhone every year or two.
Steve's one line missives have been quite frank and straightforward and the mail headers indicate that the email is from The Steve's personal iPhone. So there you have it folks, if you're still rocking a silverback iPhone this may be the summer to upgrade.