Given they are killing it, I find it rude that they're still selling it at all. I hope no one has spent the money for it in the last few months, unaware of its impending demise. Apple should have removed it from the Mac App Store when the announcement was made, or made it free, or at least included a note that it was no longer being updated in the App Store entry for it.
I liked Aperture, though it was getting rather long in the tooth - no lens correction, and noise correction was limited. It sounds like Photos isn't going to have as much power as Aperture, which is kind of troubling given the two limits I just mentioned. Given the uncertainty, I switched to Darktable for my photo processing.