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@Flowtography You're aware there is a dust and spot removal tool in C1? Less intuitive and non-sensitive to pen pressure when working with a Wacom digitizer or the like, but still, better than nothing.
I'd say Aperture is changing into something else. To me that makes a difference, as dead is end of life and no more development like some apps Google is just switching off without any replacements.And in Aperture's case the app is merged together with iPhoto into photos.app.