Recent news suggests that the Aperture and iPhoto "replacement" will have some kind of plug-in support, I have read "third party extensibility", which might actually open the door to it, with some good add-ons, becoming a valid tool. Time will tell.
Personally I'll have to balance the perhaps not-so-nice, and not-immediately-powerful-enough new photo app from Apple against the licensing and general barf-ness of Adobe's software. I'm really looking forward to that. Not.
If you force developers to use a language nobody else uses (and outside Apple nobody uses Objective-C, and now Apple would like to replace it with the new Swift too) ...While a more in-depth discussion could be had, it's a bit too off-topic here.
Update: When asked about what Aperture-like features users can expect from the new Photos app, an Apple representative mentioned plans for professional-grade features such as image search, editing, effects, and most notably, third-party extensibility. The representative also clarified the timeframe when Aperture development will end, along with an announcement about its other Pro app offerings receiving updates today; those details have been updated in the text above.
In addition to telling users that iPhoto will be discontinued and rolled into the new Photos app, Apple also confirmed to Ars Technica that Aperture will be updated to ensure Yosemite compatibility, but users shouldn't expect any further development or updates beyond that.http://arstechnica.com/apple/2014/06/apple-to-cease-development-support-of-pro-photo-app-aperture/