Thank your for this link, it gave me an additional insight to the photos app. What is really bad in the beginning is, that for the first version there is no open API for third party plug-ins. I don´t know why, but I did expect to see this in the initial version.

But so it means to wait even longer to find out about the future of photos and my future of my Aperture library.

Stuart, I was just about to post this when I saw that you kindly already did so.  I listen and follow Derrick and his tips and classes have helped me immensely with Aperture over the past few years.

He has been a strong proponent from the beginning announcement of Aperture’s demise of waiting this out unless you absolutely have decided you will need more than Photos has to offer in the short term.  He uses both Aperture and Lightroom in his work with a strong emphasis on Aperture.  

I did find that his tone after talking with Apple is much more subdued and hopeful than it has been regarding Photos as being anywhere near a replacement for Aperture.  I think that he (and others) are starting to come to the realization that Photos will very likely be a great replacement for iPhoto users, but for hard core Aperture users, it will not be so grand.  I am still going to hold out longer, but will hedge my bets and will take a couple beginner Lightroom classes in the meantime.  My personal decision will be based on the ability of Photos in the long run to integrate with the various third party processing add-ons (e.g. Nik).  I spent a lot of time and effort learning Aperture and am still clinging to hope for a solution within Apple’s infrastructure that I can live with.

:(