The day GIMP started trying to force people to save in its own proprietary format (to the great unhappiness of a large portion of its user base) rather than the format the file was OPENED in pretty much marks its death.
It doesn't "mark its death" at all. Lots of us continue to use the GIMP daily, and are more or less happy with it, while simultaneously being a bit annoyed by the decision to try to push the native file format on us through the interface. Since the menu option to overwrite the opened file was added, it's much less annoying. It's such a common thing on Slashdot to announce the complete failure of a long-term project just on the basis that the poster and his friends (if he has any) are annoyed by one or two changes that didn't suit them. There should be a word for it. The GIMP is a very useful, highly functional, stable and reliable piece of software. It's not perfect, but nothing is. Get some perspective.
Remember: Silly is a state of Mind, Stupid is a way of Life. -- Dave Butler