CaffeinatedNoms that is exactly why I still... don't laugh... use iPhoto 8.
In my opinion iPhoto 9 was a major dumbing-down of iPhoto that removed or butchered what to me are critical library management & editing tools.
Although I use my images professionally (but casually) I still use iPhoto as it has the best library structure I've encountered.
As good as Aperture is/was I always found its interface too clunky & industrial and it didn't offer the same sort of library sorting & browsing as iPhoto. Not that I found anyway.
Anyhews... on reading that iPhoto 8 is not Mavericks compatible it looks like I'll be holding off on an OS update until 'Photos' or whatever it's called is released.
I agree. I installed 9 and found it awkward and difficult, what with the email option within 9 instead of Mail, the narrow description window, the huge areas of wasted space, etc. I reinstalled 8 and have been very comfortable with it. I really don't like how Apple offers products to us, gets us to use it, and then after we invest so much time in integrating the products into the way we do things, they stop supporting it. I made that mistake with me.com (along with iWeb).
I also hope that this new app is not just some fun and whimsical app that lets us play around with our photos. I just want to organize and share and do really minor editing with the photos I shoot and scan. Will this new app let me do it as efficiently and quickly as iPhoto 8 does? I don't want to spend more hours learning and organizing again.
(Another reason why I love film and vinyl-once you have a film camera or a record player, you can always use it as long as it doesn't break. They can't change that technology on you!)