Is it? I was looking for some information that compared it to Aperture which I've been using since v1. I'd love to have an Aperture which works seamlessly with iCloud photo library; nearly all my photos are taken on an iPhone these days and it'd be great to have them integrated into the stuff I use for more deliberate photography.
Yes, it's a pretty big step down in functionality from Aperture. It's basically 80% iPhoto, 20% Aperture.
How does Aperture compare to Lightroom? (I've only ever used the latter.)
Aperture had way better UI. Lightroom had more powerful editing.
I think Photos will have the best of both worlds once Photos.framework comes to Mac.
What happens to Aperture after the upgrade? Will decide to upgrade in the near future based on what happens to it.
Aperture will not be updated any more. They announced that quite a long time ago (maybe when first introducing Photos, I don't really remember).
Sorry, probably I wasn't clear enough. I knew that Aperture won't be developed anymore, but I wanted to know if there are any conflicts while using it after the upgrade.
From what I saw if you import your photos from Aperture it just creates it's own library, and most likelys by copying everything so there should be no conflicts (but probably no synchronization either).