I migrated out of Aperture but maybe I shouldn't have panicked. A good friend is using it, and very efficiently right now. The new PacPhun apps come with plug-ins for Aperture (along with Photoshop, etc) that add almost anything aperture lacks. That and the always fantastic file handling and creation of an attached second file when using a plug-in, etc. really works. She's delaying her migration indefinitely at present, waiting to see what the Fall's system update has in store for her. Her patience is paying off for now.
I go live every Wednesday at 10am Pacific for a show of random chattering and meandering tech. Get any lingering questions you have answered!