Having migrated to Capture One for any photo processing, I have maintained iPhoto purely to enable me to order print products for delivery to family. VERY concerned to find after installing 10.10.3 the tiny iPhoto library I had, had been migrated to Photos before opening the Photos app. As that is a oneway ticket I would have been hugely concerned if Aperture access was removed purely by installing 10.10.3. This is concerning because although a unified library, my "Aperture" library was based on an iPhoto library and named as such (it had been successively updated via OS X updates) and although both iPhoto and Aperture could interact with the library it was listed as an iPhoto 9.6 library rather than an Aperture 3.6 library. I strongly suspect had I not already converted to Capture One, I would by now have zero Aperture capability on my library without having to restore it to its unconverted state (all 600GB of it).