One of his complaints is that Adobe renders RAW images better than Aperture. I have to admit that I haven't used LR much, but I have compared Aperture to Canon's own (and almost unusable) DPP RAW software, and Aperture's RAW handling is indistinguishable from DPP's. I can't imagine there's a lot of "interpretation" of RAW data involved... either you know the formatting of the bits in the RAW file and can produce the image, or you don't/can't. What's to interpret? Anyway, I probably just don't understand it. However, given Aperture's output looks identical to Canon's, if Adobe is doing something different like adding saturation, sharpness, or contrast, that's not a good thing in my mind - I shoot RAW so I can control that.
His other dislikes of Aperture are the shadow and highlight recovery... and if I understand it correctly, LR4 just caught up to Aperture 3 in this regard by adding shadow and highlight sliders? Or am I missing something here? At any rate, a few folks tried some
extreme shadow recovery on a 5D3 RAW file in different RAW processing apps and all were successful in some very effective shadow recovery - if you know how to use the various tools involved.
He says the LR Clarity Slider is "AMAZING"... what is that exactly? Is that enhancing local contrast? Is it like Aperture's Definition? or Nik's Structure? What am I missing out on?
He would have got me on his side if he said the noise reduction in Aperture sucks, but strangely this is not one of his complaints. Thankfully I've solved this through a Nik plugin.
Anyway, just because Aperture 3 is getting a bit long in the tooth, doesn't mean it's not just as effective at photo management and adjustments as the day it was released. It may be in danger of getting eclipsed by other tools, but most would say that happened some time ago, and if you were only ever concerned about who had the richest tool set you would never have started using Aperture in the first place. Aperture users, I believe, value usability, simplicity and flexible photo library management along with very capable adjustment tools. That hasn't changed as Aperture 3 ages.